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: Vasculitis pathophysiology
Vasculitis occurs when antibodies (part of the immune system of the body) accidentally mistake the proteins on blood vessels to be foreign …
VideoFree6 minutes
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Health and medicine: Chronic disease vs iron deficiency anemia
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree5 minutes
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Electrical engineering: Data wires
data wires allow you to send values directly from input sensors to output devices Electrical engineering Learn about electricity, circuit t…
VideoFree3 minutes
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Health and medicine: What is autism spectrum disorder?
Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-p…
VideoFree10 minutes
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Chemistry: The periodic table - classification of elements
Definitions of groups, periods, alkali metals, alkaline earth metals, halogens, and noble gases. How metals, non-metals, and metalloids can…
VideoFree9 minutes
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Electrical engineering: Integral of sine times cosine
Definite integral of the product of sine and cosine. Integrating sin(mt) * cos(nt) over a full period equals zero for any integer m and n. …
VideoFree4 minutes
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Electrical engineering: Voltage divider
The output voltage is a fixed fraction of the input voltage. The ratio is determined by two resistors. Electrical engineering Learn about e…
VideoFree7 minutes
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Electrical engineering: LC natural response derivation 3
We use Euler's Formula to change our complex exponential solution into a solution expressed in terms of sines and cosines. Electrical engin…
VideoFree7 minutes
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Electrical engineering: Ideal sources
Introduction to the voltage source and current source. Electrical engineering Learn about electricity, circuit theory, and introductory ele…
VideoFree3 minutes
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Chemistry: Molecular mass and molecular weight
Calculating the molecular mass and molecular weight of water. Chemistry Did you know that everything is made out of chemicals? Chemistry is…
VideoFree7 minutes
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Health and medicine: Stages of dementia and Alzheimer's disease
Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-p…
VideoFree6 minutes
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Health and medicine: Effects of axon diameter and myelination
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree11 minutes
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Health and medicine: Parts of a nephron
Learn about the 5 major parts of the kidney's nephron. Rishi is a pediatric infectious disease physician and works at Khan Academy. Health …
VideoFree9 minutes
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Health and medicine: Heart cells up close!
Get a close-up view of the cardiac cells and see what makes them different from the other (skeletal and smooth) muscle cells. Rishi is a pe…
VideoFree14 minutes
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Health and medicine: What is congenital syphilis?
Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-p…
VideoFree6 minutes