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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 12 Physics (India): Red shift

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Class 12 Physics (India) It is now time to dive deeper into the world of physics with topics from class 12 (NCERT) such as electrostatics, …

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Physics: Update and modify your ping pong ball launcher

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We upgrade our ping pong ball launcher to make it safer, more accurate and more reliable. Physics Learn about the basic principles that gov…

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Class 11 Physics (India) - Hindi: Relationship between angular velocity and speed (Hindi)

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How angular velocity relates to speed. Class 11 Physics (India) - Hindi To help students who prefer to learn by watching Hindi videos, we'v…

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Class 11 Physics (India) - Hindi: Linear expansion (Hindi)

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In this video Ram quantifies by how much will a wire expand when heated. Class 11 Physics (India) - Hindi To help students who prefer to le…

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Class 11 Physics (India) - Hindi: Intuition on static and kinetic friction comparisons (Hindi)

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Why static friction is harder to overcome than kinetic friction. Class 11 Physics (India) - Hindi To help students who prefer to learn by w…

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Class 12 Physics (India): Current through resistor in parallel: Worked example

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How to calculate the current through a resistor in parallel using equivalent resistance and Ohm's law. Class 12 Physics (India) It is now t…

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Class 11 Physics (India) - Hindi: Static and kinetic friction example (Hindi)

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Thinking about the coefficients of static and kinetic friction. Class 11 Physics (India) - Hindi To help students who prefer to learn by wa…

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Class 12 Physics (India): Simple microscope

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Let's explore how a magnifying glass (simple microscope) really works. Class 12 Physics (India) It is now time to dive deeper into the worl…

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Class 11 Physics (India) - Hindi: Newton's third law of motion (Hindi)

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Every action has an equal and opposite reaction. Class 11 Physics (India) - Hindi To help students who prefer to learn by watching Hindi vi…

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Class 11 Physics (India): Solved example: strength of femur

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How much weight can our thigh bone withstand? In this video, we will calculate the maximum force our thigh bone can withstand. The answer m…

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Class 12 Physics (India): Intro to semiconductors

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Why are we obsessed with semiconductors? All our computers and digital devices are made from semiconductors. But what is so special about t…

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Physics: How much electrolyte does a single cell need?

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Observation: when we pull our cell out of the electrolyte it still causes a deflection, which increases when pressure is applied. How could…

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Class 11 Physics (India): Ice accelerating down an incline

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Figuring out the acceleration of ice down a plane made of ice Class 11 Physics (India) Let's learn, practice, and master topics of class 11…

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Class 11 Physics (India): Formal definition of the derivative as a limit

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The derivative of function f at x=c is the limit of the slope of the secant line from x=c to x=c+h as h approaches 0. Symbolically, this is…

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Class 11 Physics (India): Thermal expansion in gas

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How to quantify thermal expansion coefficient for gases? Gases are little different than solids and liquids because they neither have defin…