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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Organic chemistry: Stabilization of a conjugate base: electronegativity
How electronegativity affects the stabilization of a conjugate base (when comparing elements in the same period) Organic chemistry Sal and …
VideoFree4 minutes
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Physics: Mach numbers
We can measure speeds relative to the speed of sound Physics Learn about the basic principles that govern the physical world around us. Sol…
VideoFree4 minutes
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Class 12 Physics (India): Electric motors (part 3)
Sal finishes the explanation of how a commutator will allow a loop of wire to continue spinning in a magnetic field, thereby allowing it to…
VideoFree7 minutes
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Class 11 Physics (India): More on Newton's second law
David explains how to use Newton's second law when dealing with multiple forces, forces in two dimensions, and diagonal forces. Class 11 Ph…
VideoFree16 minutes
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Class 12 Physics (India): Bohr model radii
Using equation for Bohr model radii to draw shell model for n=1 to 3, and calculating the velocity of a ground state electron. Class 12 Phy…
VideoFree7 minutes
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Class 11 Physics (India): Normal force and contact force
The force that keeps a block of ice from falling towards the center of the earth Class 11 Physics (India) Let's learn, practice, and master…
VideoFree7 minutes
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Class 11 Physics (India) - Hindi: Visualizing vectors in 2 dimensions (Hindi)
Visualizing, adding and breaking down vectors in 2 dimensions. Class 11 Physics (India) - Hindi To help students who prefer to learn by wat…
VideoFree14
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Class 11 Physics (India): Carnot efficiency 3: Proving that it is the most efficient
Proving that a Carnot Engine is the most efficient engine Class 11 Physics (India) Let's learn, practice, and master topics of class 11 phy…
VideoFree12 minutes
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Physics: Derivation of the mirror equation
In this video David derives the mirror equation and magnification equation. Physics Learn about the basic principles that govern the physic…
VideoFree15 minutes
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Electrical engineering: Battery and motor mounts for Spider
In this video we show you how to connect Spider's motors and batteries Electrical engineering Learn about electricity, circuit theory, and …
VideoFree6 minutes
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Health and medicine: Stenosis, ischemia and heart failure
Clarifying a bunch of medical terms around heart disease Health and medicine The medical world can be a confusing place. Patients, their fa…
VideoFree8 minutes
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Health and medicine: Multiple sclerosis treatment
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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Electrical engineering: Motor controller connections
In this video we show you how to attach and wire the L-298 motor controller board to Bit-zee's frame. Electrical engineering Learn about el…
VideoFree7 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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Health and medicine: Peripheral somatosensation
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree9 minutes