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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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Health and medicine: Somatosensation

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Explore our ability to sense the environment through our body. By Ron. Health and medicine The medical world can be a confusing place. Pati…

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Class 11 Physics (India): Limits from tables

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Sal finds the limit of 3sin(5x)/sin(2x) at x=0 using a table of values. Class 11 Physics (India) Let's learn, practice, and master topics o…

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Class 11 Physics (India): Rolling without slipping problems

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David explains how to solve problems where an object rolls without slipping. Class 11 Physics (India) Let's learn, practice, and master top…

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Health and medicine: Reiter's syndrome

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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: Precocious puberty

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At Stanford Medical School with Morgan Theis talking to Dr. Laura Bachrach talking about precocious puberty Health and medicine The medical…

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Health and medicine: Electrical system of the heart

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See where the pacemaker cells start the electrical wave of depolarization, and how it gets all the way to the ventricles of the heart. Rish…

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Class 12 Physics (India): Calculating dot and cross products with unit vector notation

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Calculating the dot and cross products when vectors are presented in their x, y, and z (or i, j, and k) components. Class 12 Physics (India…

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Organic chemistry: Nucleophilicity vs. basicity

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Nucleophilicity vs. Basicity . The difference between what it means to be a nucleophile and a base Organic chemistry Sal and Jay cover topi…

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Class 11 Physics (India): Worked example: finding unit vector with given direction

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Learn what a unit vector is and how to find a unit vector in the direction of a given vector. Class 11 Physics (India) Let's learn, practic…

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Electrical engineering: Click n' stick base & batteries

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In this video we show you how to connect Spider's motors to his tap light base. Electrical engineering Learn about electricity, circuit the…

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Class 11 Physics (India): Spring potential energy example (mistake in math)

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A spring, a frozen loop-d-loop and more! (See if you can find the mistake I made and get the right answer!) Class 11 Physics (India) Let's …

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Class 11 Physics (India) - Hindi: Standing waves in open tubes (Hindi)

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Find out why a flute makes such specific notes. Class 11 Physics (India) - Hindi To help students who prefer to learn by watching Hindi vid…

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Chemistry: Limiting reactant example problem 1

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A limiting reagent problem to calculate mass of product and mass of excess reactant leftover after reaction. Chemistry Did you know that ev…

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Health and medicine: Gestalt principles

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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…

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Health and medicine: Heart attack (myocardial infarct) medications

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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…