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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High school biology: Example identifying roles in a food web
Example identifying roles in a food web High school biology Trophic levels Topic: Science Learn about all the sciences, from physics, chemi…
VideoFree2 minutes
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Biology: Understanding and building phylogenetic trees
Learn how to read and draw phylogenetic trees, or cladograms. Biology Life is beautiful! From atoms to cells, from genes to proteins, from …
VideoFree11 minutes
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Health and medicine: Aldosterone removes acid from the blood
See how Aldosterone acts on the alpha-intercalated cell to remove protons (acid) from the blood. Rishi is a pediatric infectious disease ph…
VideoFree11 minutes
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Health and medicine: Valvular heart disease causes
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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Health and medicine: Schwann cells
This video describes the structure and function of Schwann cells. By Matt Jensen. Health and medicine The medical world can be a confusing …
VideoFree3 minutes
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Health and medicine: Activating angiotensin 2
See how Renin and ACE work to cut Angiotensinogen down to size! Rishi is a pediatric infectious disease physician and works at Khan Academy…
VideoFree10 minutes
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Class 12 Physics (India): Electric motors (part 2)
Sal shows that a commutator can be used in order to keep the loop of wire rotating in the magnetic field. Class 12 Physics (India) It is no…
VideoFree11 minutes
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Class 11 Physics (India): Thermodynamics part 4: Moles and the ideal gas law
Sal explains the concept of a mole. Then he derives the molar version of the ideal gas law PV=nRT, where the gas constant R=831 J/molK. Cla…
VideoFree10 minutes
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Class 11 Physics (India): Stellar parallax clarification
Stellar Parallax Clarification Class 11 Physics (India) Let's learn, practice, and master topics of class 11 physics (NCERT) starting with …
VideoFree2 minutes
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Class 11 Physics (India): Product rule
Introduction to the product rule, which tells us how to take the derivative of a product of functions. Class 11 Physics (India) Let's learn…
VideoFree3
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Class 11 Physics (India) - Hindi: Instantaneous speed and velocity (Hindi)
Instantaneous speed and velocity look at really small displacements over really small periods of time. Class 11 Physics (India) - Hindi To …
VideoFree12
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Organic chemistry: Alkane and cycloalkane nomenclature III
Practice naming hydrocarbons with branches and rings. Also discusses classification of carbons: primary, secondary, tertiary, and quaternar…
VideoFree13 minutes
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Class 11 Physics (India): Ideal gas equation example 4
Figuring out the molar mass of a mystery molecule at STP. Class 11 Physics (India) Let's learn, practice, and master topics of class 11 phy…
VideoFree5 minutes
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Physics: Resistors in series
Resistors that come one after another Physics Learn about the basic principles that govern the physical world around us. Solid understandin…
VideoFree11 minutes
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Class 11 Physics (India): Linear expansion
How much does iron expand on heating? How do you answer such questions? How do we assign a number to thermal expansion? In this video, we a…
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