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: 2015 AP Chemistry free response 1e
Writing the electron configuration of zinc, and figuring out which electron is removed during oxidation. From 2015 AP Chemistry free respon…
VideoFree4 minutes
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Class 11 Physics (India): More on Normal force (shoe on wall)
David shows how to determine the normal force for a shoe shoved against a wall with a diagonal force. Class 11 Physics (India) Let's learn,…
VideoFree7 minutes
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Biology: The discovery of the double helix structure of DNA
How the double helix structure of DNA was discovered. Work of Watson, Crick, Franklin, Wilkins, and Chargaff. Biology Life is beautiful! Fr…
VideoFree9 minutes
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Health and medicine: Diabetic retinopathy
Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-p…
VideoFree13 minutes
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Health and medicine: Sensory adaptation
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree7 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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Organic chemistry: Synthesis of alcohols using Grignard reagents I
Synthesis of primary, secondary, and tertiary alcohols from aldehydes and ketones using Grignard reagents. Organic chemistry Sal and Jay co…
VideoFree14 minutes
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Health and medicine: What is an aortic dissection?
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree14 minutes
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Health and medicine: Pacinian's Corpuscle and Merkel's Disk
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree7 minutes
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Health and medicine: Multiple sclerosis signs and symptoms
Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-p…
VideoFree9 minutes
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Chemistry: Introduction to reaction quotient Qc
Introduction to the reaction quotient Qc, and comparing the reaction quotient with the equilibrium constant to predict how concentrations w…
VideoFree8 minutes
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Class 11 Physics (India): Newton's third law of motion
Every action has an equal and opposite reaction Class 11 Physics (India) Let's learn, practice, and master topics of class 11 physics (NCER…
VideoFree8 minutes
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Class 11 Physics (India) - Hindi: Two masses hanging from a pulley (Hindi)
In this video Ram explains how to find the acceleration of two masses hanging from a pulley (using the easy method). Class 11 Physics (Indi…
VideoFree8
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Class 11 Physics (India): Horizontally launched projectile
How to solve for the horizontal displacement when the projectile starts with a horizontal initial velocity. We also explain common mistakes…
VideoFree12 minutes
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Physics: Thermodynamic entropy definition clarification
Clarifying that the thermodynamic definition of Entropy requires a reversible system. Physics Learn about the basic principles that govern …
VideoFree16 minutes