Khan Academy: 2757 products
Khan Academy is an organization on a mission. We're a not-for-profit with the goal of changing education for the better by providing a free world-class education for anyone anywhere.
All of the site's resources are available to anyone. It doesn't matter if you are a student, teacher, home-schooler, principal, adult returning to the classroom after 20 years, or a friendly alien just trying to get …
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Health and medicine: New perspective on the heart
Take a look at the heart in cross section, looking down at it from the top! Rishi is a pediatric infectious disease physician and works at …
VideoFree9 minutes
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Class 11 Physics (India): Basic derivative rules (Part 1)
Sal introduces the Constant rule, which says that the derivative of f(x)=k (for any constant k) is f'(x)=0. He also justifies this rule alg…
VideoFree2
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Health and medicine: What is arthritis?
Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-p…
VideoFree9 minutes
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Class 11 Physics (India): Solving elastic collision problems the hard way
In this video, David shows how to solve elastic problems the hard way. In other words, using conservation of momentum and conservation of k…
VideoFree16 minutes
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Class 11 Physics (India): Capillary action and why we see a meniscus
How capillary action and the meniscus are related to intermolecular forces in water. Class 11 Physics (India) Let's learn, practice, and ma…
VideoFree8 minutes
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Physics: Algebraically manipulating Lorentz transformation
The forms in which we've introduced the Lorentz transformations are really nice in that they reveal the symmetry of the two axes of spaceti…
VideoFree8 minutes
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Health and medicine: Theories of language and cognition
Learn about theories of the relationship between language and cognition. By Carole Yue. Health and medicine The medical world can be a conf…
VideoFree5 minutes
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Chemistry: Standard reduction potentials
How to use a table of standard reduction potentials to calculate standard cell potential. Identifying trends in oxidizing and reducing agen…
VideoFree9 minutes
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Class 11 Physics (India): Deriving the shortcut to solve elastic collision problems
In this video, David derives the expression that we can use as a shortcut to solve for finding the velocities in an elastic collision probl…
VideoFree12 minutes
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Class 11 Physics (India): Derivative as slope of curve
Sal solves a couple of problems where he interprets the derivative of a function at a point as the slope of the curve, or of the line tange…
VideoFree6
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Chemistry: Ideal gas equation example 3
Figuring out the mass of Oxygen we have at a given P, V, and T, and why we need to check the units of R. Chemistry Did you know that everyt…
VideoFree6 minutes
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Class 11 Physics (India): Introduction to minimum and maximum points
Sal explains all about minimum and maximum points, both absolute and relative. Class 11 Physics (India) Let's learn, practice, and master t…
VideoFree6
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Class 11 Physics (India): Unit vector notation (part 2)
More on unit vector notation. Showing that adding the x and y components of two vectors is equivalent to adding the vectors visually using …
VideoFree9 minutes
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Class 11 Physics (India): Inclined plane force components
Figuring out the components of the force due to gravity that are parallel and perpendicular to the surface of an inclined plane Class 11 Ph…
VideoFree13 minutes
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Health and medicine: What is anemia?
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree8 minutes