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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Physics: Lorentz transformation derivation part 1
Using symmetry of frames of reference and the absolute velocity of the speed of light (regardless of frame of reference) to begin to solve …
VideoFree11 minutes
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Class 11 Physics (India): Free body diagram with angled forces: worked example
Sal draws a free body diagram for a box held stationary against a wall with a force at an angle theta. Class 11 Physics (India) Let's learn…
VideoFree6
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Class 11 Physics (India): Position-time graphs
Using position-time graphs and number lines to find displacement and distance traveled. Class 11 Physics (India) Let's learn, practice, and…
VideoFree5
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Class 11 Physics (India) - Hindi: Intuition on static and kinetic friction comparisons (Hindi)
Why static friction is harder to overcome than kinetic friction. Class 11 Physics (India) - Hindi To help students who prefer to learn by w…
VideoFree7
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Electrical engineering: What is inside a digital camera? (2 of 2)
In this video we compare different revisions of the same digital camera. Electrical engineering Learn about electricity, circuit theory, an…
VideoFree3 minutes
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Health and medicine: Motor unit
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree10 minutes
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Class 11 Physics (India) - Hindi: Potential energy stored in a spring (Hindi)
Work needed to compress a spring is the same as the potential energy stored in the compressed spring. Class 11 Physics (India) - Hindi To h…
VideoFree12
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Class 11 Physics (India): Angular momentum of an extended object
In this video David derives and shows how to use the formula for the angular momentum of an extended object. Class 11 Physics (India) Let's…
VideoFree10 minutes
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Physics: Projectile on an incline
Challenging problem of a projectile on an inclined plane Physics Learn about the basic principles that govern the physical world around us.…
VideoFree18 minutes
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Health and medicine: Inflammation
Dr. David Agus talks about inflammation (while Sal repeatedly misspells it with one "m") Health and medicine The medical world can be a con…
VideoFree9 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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Health and medicine: Breast anatomy and lactation
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree7 minutes
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Class 11 Physics (India) - Hindi: Constructive and Destructive interference (Hindi)
In this video Ram explains how Noise canceling headphones work using constructive and destructive interference. Class 11 Physics (India) - …
VideoFree8
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Health and medicine: Photoreceptors (rods vs cones)
In this video, I explore the similarities and differences between rods and cones. By Ronald Sahyouni. Health and medicine The medical world…
VideoFree5 minutes
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Class 11 Physics (India): Reverse power rule
Can you find a function whose derivative is x^n? Class 11 Physics (India) Let's learn, practice, and master topics of class 11 physics (NCE…
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