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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): Transistor as a switch

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Let's see how we can exploit the cut off and saturation behaviour of a transistor and build an incredibly efficient switch. Class 12 Physic…

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Class 11 Physics (India): Unbalanced forces and motion

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Thinking about what is true about how unbalanced forces relate to motion and acceleration Class 11 Physics (India) Let's learn, practice, a…

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Class 11 Physics (India) - Hindi: Normal force in an elevator (Hindi)

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How the normal force changes when an elevator accelerates. Class 11 Physics (India) - Hindi To help students who prefer to learn by watchin…

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Health and medicine: Treating type II diabetes - Pharmacology

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Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-p…

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Physics: AP Physics 1 review of Energy and Work

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In this video David explains the concepts in Work and Energy and does an example problem for each concept. Link for document: https://www.d…

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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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Physics: Electromagnetic field (above vs. below)

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Testing the direction of force when the current carrying wire is above vs. below a compass. What does this tell us? Physics Learn about the…

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Electrical engineering: Battery and motor mounts for Spider

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In this video we show you how to connect Spider's motors and batteries Electrical engineering Learn about electricity, circuit theory, and …

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Class 11 Physics (India): Bouncing fruit collision example

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David shows how to use conservation of momentum for a situation where two objects bounce off of each other. Class 11 Physics (India) Let's …

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Class 10 Physics (India): Presbyopia

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Let's explore what are the symptoms and causes of Presbyopia. We will also see how bifocals correct them. Created by Mahesh Shenoy Class 10…

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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 12 Physics (India): Minority charge carriers in extrinsic semiconductors

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When we add impurities to semiconductors, what happens to minority charge carriers? Do they remain the same? In this video, we will explore…

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Class 11 Physics (India) - Hindi: Rolling without slipping (Hindi)

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Ram explains how to solve problems where an object rolls without slipping. Class 11 Physics (India) - Hindi To help students who prefer to …

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Class 10 Physics (India): Magnification formula for mirrors

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Let's explore how to calculate image height and it's nature (real or virtual) using magnification formula Created by Mahesh Shenoy Class 10…

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Health and medicine: Pain and temperature

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Explore our senses of pain & temperature. By Ron. Health and medicine The medical world can be a confusing place. Patients, their families,…