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: 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
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Class 11 Physics (India): How tall can mountains get?
Is there is a limit to the height of a mountain? Let's see what the height of a mountain has got to do with elastic properties of a materia…
VideoFree8
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Class 12 Physics (India): De Broglie wavelength
In this video, David explains how Louis De Broglie got his Nobel Prize for the idea of matter having a wavelength. Class 12 Physics (India)…
VideoFree11 minutes
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Chemistry: Electrodes and voltage of Galvanic cell
Identifying the anode and cathode in a galvanic cell, and calculating the voltage using standard electrode potentials. Chemistry Did you kn…
VideoFree5 minutes
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Health and medicine: Decay and interference
Learn about decay and interference in human memory. Health and medicine The medical world can be a confusing place. Patients, their familie…
VideoFree5 minutes
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Class 11 Physics (India) - Hindi: Masses on incline system problem(Hindi)
In this video Ram explains how to find the acceleration and tension for a system of masses involving an incline. Class 11 Physics (India) -…
VideoFree11
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Physics: Electrolyte (salt test)
What happens to the deflection when we add salt to an electrolyte? Why? Physics Learn about the basic principles that govern the physical w…
VideoFree1 minute
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Class 11 Physics (India): Worked example: two inputs with the same output (graph)
Sal finds the input value other than -5 for which f(x)=f(-5), given the graph of f. Class 11 Physics (India) Let's learn, practice, and mas…
VideoFree2
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Class 11 Physics (India): Antiderivatives and indefinite integrals
What's the opposite of a derivative? It's something called the "indefinite integral". Class 11 Physics (India) Let's learn, practice, and m…
VideoFree4
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Class 11 Physics (India): Super hot tension
David shows how to solve a super hot tension problem where a can of peppers hangs from two diagonal strings. Class 11 Physics (India) Let's…
VideoFree17 minutes
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Health and medicine: Left ventricular pressure vs. time
Ever wonder exactly how the left ventricle's pressure changes over time? Find out in this color-coded video! Rishi is a pediatric infectiou…
VideoFree11 minutes
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Physics: Solving for time
Rate of change in position, or speed, is equal to distance traveled divided by time. To solve for time, divide the distance traveled by the…
VideoFree10 minutes
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Class 11 Physics (India): Acceleration vs. time graphs
David explains how to read an acceleration vs. time graph. He then shows how the area under the curve gives the change in velocity and does…
VideoFree15 minutes
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Class 11 Physics (India): Intro to significant figures
Significant figures refers to the number of important single digits in a value, often a measurement. This video is an introduction to signi…
VideoFree5
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Health and medicine: Cytotoxic T cells
How cytotoxic T cells get activated by MHC-I/antigen complexes and then proceed to kill infected cells Health and medicine The medical worl…
VideoFree10 minutes