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: Optimal angle for a projectile part 1: Components of initial velocity
You want a projectile to fly as far as possible, at which angle should you launch it? We'll start with formulas for the initial velocity. P…
VideoFree6 minutes
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Health and medicine: Cytotoxic T cells
How cytotoxic T cells get activated by MHC-I/antigen complexes and then proceed to kill infected cells Health and medicine The medical worl…
VideoFree10 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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Health and medicine: Reiter's syndrome
Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-p…
VideoFree8 minutes
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Health and medicine: Vasculitis pathophysiology
Vasculitis occurs when antibodies (part of the immune system of the body) accidentally mistake the proteins on blood vessels to be foreign …
VideoFree6 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
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Class 11 Physics (India) - Hindi: Moments part 2 (Hindi)
2 more moment problems. Class 11 Physics (India) - Hindi To help students who prefer to learn by watching Hindi videos, we've created the c…
VideoFree11
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Class 11 Physics (India): Airbus A380 take-off distance
How long of a runway does an A380 need? Class 11 Physics (India) Let's learn, practice, and master topics of class 11 physics (NCERT) start…
VideoFree5 minutes
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Physics: Introduction to tension
An introduction to tension. Solving for the tension(s) in a set of wires when a weight is hanging from them. Physics Learn about the basic …
VideoFree10 minutes
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Class 12 Physics (India): Capacitors and capacitance
A basic overview of capacitors and capacitance. By David Santo Pietro. Class 12 Physics (India) It is now time to dive deeper into the worl…
VideoFree6 minutes
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Class 11 Physics (India): Rotational kinetic energy
David explains what rotational kinetic energy is and how to calculate it. Class 11 Physics (India) Let's learn, practice, and master topics…
VideoFree14 minutes
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Health and medicine: Heart attack (myocardial infarct) diagnosis
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree11 minutes
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Class 11 Physics (India): Two masses hanging from a pulley
In this video David explains how to find the acceleration of two masses hanging from a pulley (using the easy method). Class 11 Physics (In…
VideoFree9 minutes
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Health and medicine: Glomerular filtration in the nephron
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): Relative velocity in 2D
How fast is the sheep moving as seen by the lion? In previous videos, we have already seen how to calculate relative velocity in 1D. In thi…
VideoFree9