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: How white blood cells move around
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree9 minutes
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Class 10 Physics (India): Convex & concave mirror ray diagrams
Let's explore the ray tracing technique to figure out the properties of images when things are kept in front of a concave or a convex mirro…
VideoFree13
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Health and medicine: Tetralogy of fallot
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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Physics: Electrolyte test (pure water vs. vinegar)
First we attach our galvanometer to a piece of copper and zinc. Then we submerge the metals in pure water and vinegar. What is the differen…
VideoFree1 minute
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Organic chemistry: Alkane and cycloalkane nomenclature I
Using IUPAC rules to name linear, branched, and cyclic hydrocarbons Organic chemistry Sal and Jay cover topics covered in college organic c…
VideoFree13 minutes
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Health and medicine: Flu vaccine efficacy
Find out just how useful the flu vaccine actually is at preventing the flu! Rishi is a pediatric infectious disease physician and works at …
VideoFree10 minutes
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Health and medicine: Understanding R nought
Dr. Rishi Desai is a pediatric infectious disease physician and former epidemiologist with the Centers for Disease Control and Prevention (…
VideoFree9 minutes
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Class 11 Physics (India): Differentiating products
Sal differentiates eˣcos(x) using the product rule. Class 11 Physics (India) Let's learn, practice, and master topics of class 11 physics (…
VideoFree4
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Class 11 Physics (India): Vector magnitude from graph
Sal finds the magnitude of a vector given its graph. Class 11 Physics (India) Let's learn, practice, and master topics of class 11 physics …
VideoFree4
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Health and medicine: What is waldenstrom macroglobulinemia?
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree6 minutes
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Health and medicine: Types of pulmonary diseases
Learn what the main classifications of lung diseases are: obstructive, restrictive, ventilation, and perfusion. Discover the classification…
VideoFree12 minutes
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Class 12 Physics (India): How telescopes work
Let's explore how telescopes work intuitively using a demo. Then we will talk about some nuances involved in drawing ray diagrams and deriv…
VideoFree8
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Class 12 Physics (India): Kirchhoff's voltage law
Kirchhoff's Voltage Law says if you travel around any loop in a circuit, the voltages across the elements add up to zero. Class 12 Physics …
VideoFree7 minutes
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Health and medicine: Drug use prevention - school programming and protective factors
Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-p…
VideoFree11 minutes
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Class 12 Physics (India): Output characteristics of NPN transistor
Let's explore the behaviour of output current (collector current Ic) as the output voltage (Vce) is changed in an NPN transistor. Class 12 …
VideoFree9