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: Reactions in equilibrium
Equilibrium reactions and constants. Chemistry Did you know that everything is made out of chemicals? Chemistry is the study of matter: its…
VideoFree15 minutes
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Chemistry: Definition of pH
Introduction to pH and the pH scale. Examples of calculating pH of pure water, bleach, and orange juice. Chemistry Did you know that everyt…
VideoFree12 minutes
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Chemistry: 2015 AP Chemistry free response 7
Energy necessary to recycle aluminum from aluminum oxide. From 2015 AP Chemistry free response 7. Chemistry Did you know that everything is…
VideoFree6 minutes
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Biology: Light dependent reactions actors
More detailed description of the various molecular actors in the light dependent reactions. Biology Life is beautiful! From atoms to cells,…
VideoFree7 minutes
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Chemistry: Autoionization of water
Autoionization of water into hydronium and hydroxide ions. Chemistry Did you know that everything is made out of chemicals? Chemistry is th…
VideoFree11 minutes
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Chemistry: Finding formula for ionic compounds
Finding formula from name of ionic compound, using example of calcium bromide. Chemistry Did you know that everything is made out of chemic…
VideoFree3 minutes
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Electrical engineering: RC natural response - intuition
We put some charge on a capacitor in an RC circuit and observe what happens to the voltage and current. This is called the natural response…
VideoFree7 minutes
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Cosmology and astronomy: Supernova (supernovae)
Supernova (Supernovae) Cosmology and astronomy It's a great, big universe out there. In this section of Khan Academy, you'll learn about th…
VideoFree12 minutes
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Organic chemistry: E2 elimination: Stereoselectivity
Stereoselectivity of E2 elimination reactions. Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basi…
VideoFree11 minutes
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Chemistry: Visually understanding balancing chemical equations
Relating the balanced chemical equation to the structural formulas of the reactants and products. Chemistry Did you know that everything is…
VideoFree5 minutes
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Chemistry: Change of state example
Specific heat capacity and enthalpy of vaporization example: calculating how much energy it takes to vaporize 1.00 kg of ethanol starting f…
VideoFree8 minutes
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Organic chemistry: Reactions at the benzylic position
Free radical bromination, nucleophilic substitution, oxidation. Organic chemistry Sal and Jay cover topics covered in college organic chemi…
VideoFree10 minutes
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Electrical engineering: Camera wiring update
This video shows you how to reduce the complexity of your Bit-zee while improving the speed of your Bit-zee digital camera. Electrical engi…
VideoFree3 minutes
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Electrical engineering: Spout antennae and tail
Electrical engineering Learn about electricity, circuit theory, and introductory electronics. We also have sections that let you get down a…
VideoFree9 minutes
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Electrical engineering: Click n' stick base & batteries
In this video we show you how to connect Spider's motors to his tap light base. Electrical engineering Learn about electricity, circuit the…
VideoFree3 minutes