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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Class 11 Physics (India): Sine & cosine identities: symmetry
Sal finds several trigonometric identities for sine and cosine by considering horizontal and vertical symmetries of the unit circle. Class …
VideoFree8
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Physics: The battery and electromagnetism
The key technologies in our story. Physics Learn about the basic principles that govern the physical world around us. Solid understanding o…
VideoFree6 minutes
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Physics: Electrode (surface area test)
What's the difference between one piece of metal and three pieces of metal in our cell. Does deflection change? Why? Physics Learn about th…
VideoFree1 minute
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Health and medicine: Visual field processing
In this video, I review how we process our visual field, and how information from the right and left visual field is broken down and sent t…
VideoFree4 minutes
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Class 12 Physics (India): Magnetic force on a proton example (part 1)
Sal does an example problem to determine the size and direction of the magnetic force on a proton moving through a magnetic field. Class 12…
VideoFree11 minutes
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Health and medicine: Polyarteritis nodosa
Polyarteritis nodosa is a type of vasculitis that affects small to medium arteries and leads to significant narrowing of the vasculature. P…
VideoFree12 minutes
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Health and medicine: Types of diabetes
Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-p…
VideoFree6 minutes
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Class 12 Physics (India): Net electric field from multiple charges in 1D
In this video David solves an example problem to find the net electric field created by multiple charges at a point in between them. Class …
VideoFree7 minutes
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Class 12 Physics (India): Magnetic force between two currents going in opposite directions
Sal shows how to determine the magnetic force between two currents going in opposite directions. Class 12 Physics (India) It is now time to…
VideoFree11 minutes
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Chemistry: Collision theory
An introduction to collision theory and activation energy. Chemistry Did you know that everything is made out of chemicals? Chemistry is th…
VideoFree9 minutes
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Class 11 Physics (India): Projectile motion graphs
Visualizing position, velocity and acceleration in two-dimensions for projectile motion Class 11 Physics (India) Let's learn, practice, and…
VideoFree8
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Physics: Maxwell's demon
Maxwell's Demon: A thought experiment that seems to defy the 2nd Law of Thermodynamics Physics Learn about the basic principles that govern…
VideoFree13 minutes
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Class 12 Physics (India): Half wave rectifiers
How do you convert AC to DC? The circuits that do that are called Rectifiers. Turns out there are different kinds of rectifiers, some simpl…
VideoFree11
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Health and medicine: Mouth
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree8 minutes
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Electrical engineering: AC analysis intro 1
Solving circuits with differential equations is hard. If we limit ourselves to sinusoidal input signals, a whole new method of AC analysis …
VideoFree7 minutes