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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Electrical engineering: Diode
Introducing the diode as a circuit element. A diode conducts current in one direction but not the other. Electrical engineering Learn about…
VideoFree11 minutes
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Chemistry: Worked example: Identifying isotopes and ions
Identifying isotopes and ions from the number of electrons, protons and neutrons, and vice versa. Chemistry Did you know that everything is…
VideoFree4 minutes
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Electrical engineering: Digital camera connections II
In this video we show you how to attach Bit-zee's camera and route the wires Electrical engineering Learn about electricity, circuit theory…
VideoFree3 minutes
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Organic chemistry: Naming cubane
Systematic naming of cubane. Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basic understanding of…
VideoFree6 minutes
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Biology: Photosynthesis: Overview of the light-dependent reactions
Overview of the light-dependent reactions, including the structure of the chloroplast, the photosystems, and how ATP is synthesized. Biolog…
VideoFree20 minutes
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Cosmology and astronomy: Hawaiian islands formation
The Hawaiian Islands formed primarily as a result of volcanic activity. While most islands form near tectonic plate boundaries, the Hawaii…
VideoFree8 minutes
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Biology: Dehydration synthesis or a condensation reaction
Dehydration synthesis (condensation reaction) between sugar molecules. Monosaccharides, disaccharides, and polysaccharides. Formation of ma…
VideoFree10 minutes
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Electrical engineering: Spider's Arduino Nano
Electrical engineering Learn about electricity, circuit theory, and introductory electronics. We also have sections that let you get down a…
VideoFree6 minutes
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Biology: Lactic acid fermentation
Lactic acid fermentation. How organisms like lactobacillus convert pyruvic acid to lactic acid and oxidize NADH to NAD+ in the process. Bio…
VideoFree11 minutes
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Biology: Photosynthesis
Overview of photosynthesis. What photosynthesis accomplishes, why it's important, and how the light-dependent and light-independent reactio…
VideoFree14 minutes
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Electrical engineering: Sine and cosine from rotating vector
One way to generate sine and cosine is to track the motion of a rotating vector. Animated. Electrical engineering Learn about electricity, …
VideoFree4 minutes
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High school biology: Asexual and sexual reproduction
Binary fission, budding, mitosis, fragmentation, parthenogenesis and sexual reproduction. High school biology Types of reproduction Learn a…
VideoFree9
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Electrical engineering: Spout motor mount
Electrical engineering Learn about electricity, circuit theory, and introductory electronics. We also have sections that let you get down a…
VideoFree4 minutes
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Electrical engineering: Connect the LEDs to an on/off switch
Electrical engineering Learn about electricity, circuit theory, and introductory electronics. We also have sections that let you get down a…
VideoFree5 minutes
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Chemistry: Second-order reaction example
Example of using integrated rate law to solve for concentration, and calculating the half life for a second-order reaction. Chemistry Did y…
VideoFree8 minutes