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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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Electrical engineering: Integral of sin(mt) and cos(mt)

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Integrating sin(mt) and cos(mt) over a full period equals zero. Electrical engineering Learn about electricity, circuit theory, and introdu…

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Electrical engineering: Ben Eater's Spider

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In this video Karl talks to Ben Eater about his improvements to the Spider bot platform. Electrical engineering Learn about electricity, ci…

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Health and medicine: Diagnosing bipolar disorder

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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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Class 11 Physics (India) - Hindi: Treating systems the hard way (Hindi)

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Solving pulley block problems by considering a system. Class 11 Physics (India) - Hindi To help students who prefer to learn by watching Hi…

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Health and medicine: Hemoglobin moves O2 and CO2

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Learn the two ways that oxygen moves from the lungs to the tissues, and the three ways that carbon dioxide returns from the tissues to the …

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Health and medicine: Schizophrenia diagnosis

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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: Inflammatory bowel disease: Epidemiology & pathology

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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: Poliomyelitis diagnosis and 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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Health and medicine: Risk factors for drug use and drug abuse

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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: Epiglottitis diagnosis and treatment

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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: Neuron resting potential mechanism

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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: Drawing a pressure-volume loop

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Use the left ventricular pressure and volume information to put together a cool new graph. Rishi is a pediatric infectious disease physicia…

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Health and medicine: Contractility, Ea, and preload effects on PV boxes

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See how contractility, Ea (arterial elastance), and preload each have an effect on PV Boxes. Rishi is a pediatric infectious disease physic…

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Health and medicine: Inflammation

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Dr. David Agus talks about inflammation (while Sal repeatedly misspells it with one "m") Health and medicine The medical world can be a con…

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Health and medicine: Molarity vs. osmolarity

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Molarity and osmolarity may sound similar, but they are two distinct concepts. Molarity (M) is the number of moles of solute per liter of s…