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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Chemistry: Nernst equation
Deriving a few different forms of the Nernst equation, the relationship between Gibbs free energy and reaction quotient Q. Chemistry Did yo…
VideoFree7 minutes
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Class 11 Physics (India) - Hindi: Total displacement for projectile (Hindi)
Calculating the total final velocity for a projectile landing at a different altitude. Class 11 Physics (India) - Hindi To help students wh…
VideoFree11
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Class 11 Physics (India) - Hindi: Change in centripetal acceleration from change in linear velocity and radius: Examples (Hindi)
Centripetal acceleration from linear and angular velocity. Class 11 Physics (India) - Hindi To help students who prefer to learn by watchin…
VideoFree5
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Class 11 Physics (India): Impact velocity from given height
Determining how fast something will be traveling upon impact when it is released from a given height Class 11 Physics (India) Let's learn, …
VideoFree12 minutes
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Physics: Work and energy (part 2)
More on work. Introduction to Kinetic and Potential Energies. Physics Learn about the basic principles that govern the physical world aroun…
VideoFree10 minutes
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Class 11 Physics (India): Horizontally launched projectile
How to solve for the horizontal displacement when the projectile starts with a horizontal initial velocity. We also explain common mistakes…
VideoFree12 minutes
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Physics: Thermodynamic entropy definition clarification
Clarifying that the thermodynamic definition of Entropy requires a reversible system. Physics Learn about the basic principles that govern …
VideoFree16 minutes
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Class 11 Physics (India): Worked example: Derivative of cos³(x) using the chain rule
f(x)=cos³(x) is a composition of the functions x³ and cos(x), and therefore we can differentiate it using the chain rule. Class 11 Physics …
VideoFree9
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Physics: Increase strength of magnet
How can we increase the strength of a bar magnet using a piece of steel? Why is it stronger? Physics Learn about the basic principles that …
VideoFree1 minute
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Class 11 Physics (India): Limits by direct substitution
Sal explains how you can easily find limits of functions at points where the functions are continuous: simply plug in the x-value into the …
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Class 11 Physics (India): Pressure at a depth in a fluid
Sal derives the formula to determine the pressure at a specific depth in a fluid. Class 11 Physics (India) Let's learn, practice, and maste…
VideoFree10 minutes
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Organic chemistry: Synthesis of alcohols using Grignard reagents I
Synthesis of primary, secondary, and tertiary alcohols from aldehydes and ketones using Grignard reagents. Organic chemistry Sal and Jay co…
VideoFree14 minutes
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Health and medicine: What is an aortic dissection?
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree14 minutes
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Health and medicine: Multiple sclerosis signs and symptoms
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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Health and medicine: Sensory adaptation
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree7 minutes