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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 11 Physics (India): Harmonic motion part 3 (no calculus)

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Figuring out the period, frequency, and amplitude of the harmonic motion of a mass attached to a spring. Class 11 Physics (India) Let's lea…

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Class 11 Physics (India) - Hindi: Thermal Expansion in Liquids (Hindi)

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Like solids, liquids too expand on heating. Let's find out more about how we can calculate the change and how liquid's thermal expansion is…

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Class 12 Physics (India): Net electric field from multiple charges in 2D

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In this video David solves an example 2D electric field problem to find the net electric field at a point above two charges. Class 12 Physi…

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

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Why static friction is harder to overcome than kinetic friction Class 11 Physics (India) Let's learn, practice, and master topics of class …

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Class 11 Physics (India) - Hindi: Angular momentum of an extended object (Hindi)

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In this video Ram derives and shows how to use the formula for the angular momentum of an extended object. Class 11 Physics (India) - Hindi…

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Class 11 Physics (India): Linear velocity comparison from radius and angular velocity: Worked example

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Linear velocity from the radius and angular velocity for two pumpkin catapults with different arm lengths. Class 11 Physics (India) Let's l…

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Class 11 Physics (India): Boyle's law

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Class 11 Physics (India) Let's learn, practice, and master topics of class 11 physics (NCERT) starting with kinematics and then moving to d…

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Class 11 Physics (India): Area expansion coefficient

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Let's explore how to calculate changes in areas of things, when they are heated. By the way changes in area is also called superficial expa…

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Class 12 Physics (India): Current due to closing a switch: worked example

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Find the current due to closing a switch using equivalent resistance and Ohm's law. Class 12 Physics (India) It is now time to dive deeper …

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Class 11 Physics (India): Pressure and Pascal's principle (part 1)

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Sal explains the difference between liquids and gasses (both fluids). He then starts a calculation of the work done on a liquid in a U-shap…

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Class 10 Physics (India): Why is the sky blue?

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Let's explore why the sky is blue, why the sunset/sunrise is red, why are clouds white. It's all due to scattering of light by the molecule…

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Class 11 Physics (India): Unit vector notation

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Expressing a vector as the scaled sum of unit vectors Class 11 Physics (India) Let's learn, practice, and master topics of class 11 physics…

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Health and medicine: Diastolic heart failure pathophysiology

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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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Health and medicine: Endocrine gland hormone review

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Welcome to the Endocrine System. Get ready to learn about one of the most important ways that our body parts communicate! By Ryan Patton. H…

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Health and medicine: Tolerance and withdrawal

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Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…