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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Chemistry: Orbitals
Introduction to orbitals. Relates energy shell to rows and periods in the periodic table. Chemistry Did you know that everything is made ou…
VideoFree14 minutes
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Organic chemistry: Nucleophilic aromatic substitution I
The addition-elimination mechanism. Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basic understan…
VideoFree10 minutes
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Health and medicine: Coagulation cascade
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree15 minutes
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Chemistry: 2015 AP Chemistry free response 2a (part 2/2) and b
Efficiency of ethanal dehydration reaction. From 2015 AP Chemistry free response 2a (part 2/2) and 2b. Chemistry Did you know that everythi…
VideoFree6 minutes
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Health and medicine: Compliance and elastance
Learn about compliance (and elastance) of arteries, veins, and lead pipes! Rishi is a pediatric infectious disease physician and works at K…
VideoFree10 minutes
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Organic chemistry: Curly arrow conventions in organic chemistry
Conventions for drawing curved arrows that represent the movements of electrons. Organic chemistry Sal and Jay cover topics covered in coll…
VideoFree7 minutes
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Health and medicine: Aortic stenosis and aortic regurgitation
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree12 minutes
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Chemistry: Redox reaction from dissolving zinc in copper sulfate
What happens when you add zinc to a solution of copper sulfate? Identifying the half reactions to see what got oxidized and reduced. Chemis…
VideoFree5 minutes
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Class 11 Physics (India): Momentum: Ice skater throws a ball
A simple conservation of momentum problem involving an ice skater and a ball Class 11 Physics (India) Let's learn, practice, and master top…
VideoFree6 minutes
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Physics: Convex parabolic mirrors
Convex Parabolic Mirrors Physics Learn about the basic principles that govern the physical world around us. Solid understanding of algebra …
VideoFree6 minutes
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Class 11 Physics (India): Solved example: percentage change in density
Let's explore how to figure out the percentage change in density of a material when it is subjected to bulk stress in this problem-solving …
VideoFree12
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Class 11 Physics (India): Identifying centripetal force for cars and satellites
Identifying forces or force components acting as the centripetal force for a car driving in a horizontal circle, a car driving in a vertica…
VideoFree10
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Organic chemistry: Acidic cleavage of ethers
Reaction of ethers with strong acids to form an alcohol and an alkyl halide. Organic chemistry Sal and Jay cover topics covered in college …
VideoFree12 minutes
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Organic chemistry: Friedel-Crafts acylation
Friedel-Crafts acylation reaction. Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basic understand…
VideoFree11 minutes
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Organic chemistry: Reactivity of aldehydes and ketones
Electron distribution in aldehydes and ketones and how it influences reactivity. Organic chemistry Sal and Jay cover topics covered in coll…
VideoFree10 minutes