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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: Emotions: cerebral hemispheres and prefrontal cortex

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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: End diastolic pressure-volume relationship (EDPVR)

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Find out what happens when the left ventricle is not allowed to contract, and instead you simply add and take away blood from it. Rishi is …

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Class 11 Physics (India): Doppler effect formula for observed frequency

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Let's derive the formula for how the perceived frequency of a sound changes when its source is moving toward you Class 11 Physics (India) L…

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Health and medicine: Regulation of blood pressure with baroreceptors

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Learn about how the arteries use nerve impulses to help regulate blood pressure. Rishi is a pediatric infectious disease physician and work…

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Health and medicine: A race to keep pace!

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Find out how the various pacemaker cells in the heart actually race against the clock to try to keep pace for the heart, and how the heart …

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Health and medicine: Shunting in the heart

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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: Patent ductus arteriosus

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Patent ductus arteriosus is a medical condition where a blood vessel called the ductus arteriosus does not permanently close after birth. L…

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Class 11 Physics (India): The force of tension

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David explains what the force of tension is, how to solve for it, and some common misconceptions involving the force of tension. Class 11 P…

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Health and medicine: Multiple sclerosis treatment

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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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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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Class 11 Physics (India): Thermodynamics part 3: Kelvin scale and Ideal gas law example

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Sal makes the case for the Kelvin scale of temperature and absolute zero by showing that temperature is proportional to kinetic energy. The…

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Health and medicine: Leukemia treatment

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There are three main solutions to treat leukemia. Chemotherapy is a collection of drugs which target cells that rapidly multiply (a key cha…

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Organic chemistry: Enolate formation from aldehydes

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How to form enolates from aldehydes using sodium ethoxide and sodium hydride. Organic chemistry Sal and Jay cover topics covered in college…

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Class 11 Physics (India) - Hindi: Centripetal force problem solving (Hindi)

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In this video, Ram gives some problem-solving strategies for centripetal force problems and explains many common misconceptions people have…

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Class 12 Physics (India): Electric potential energy (part 2-- involves calculus)

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Electric potential energy difference in a varying field Class 12 Physics (India) It is now time to dive deeper into the world of physics wi…