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: Limiting reactant example problem 1
A limiting reagent problem to calculate mass of product and mass of excess reactant leftover after reaction. Chemistry Did you know that ev…
VideoFree19 minutes
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Health and medicine: Arteriosclerosis, arteriolosclerosis, and atherosclerosis
Learn the difference between Arteriosclerosis, Arteriolosclerosis, and Atherosclerosis! Rishi is a pediatric infectious disease physician a…
VideoFree9 minutes
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Health and medicine: Chronic bronchitis pathophysiology
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: Blood types
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: Tonsillitis
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: Layers of a blood vessel
Remember the 3 key layers of a blood vessel (Tunica intima, Tunica media, and Tunica externa) and how arteries, veins, and capillaries are …
VideoFree10 minutes
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Health and medicine: Heart disease and heart attacks
Basics of heart disease, heart attacks, heart failure, angina, cardiac arrest. Special thanks to Edward J Perper, MD for help in clarifying…
VideoFree12 minutes
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Electrical engineering: Battery wires
In this video we upgrade Bit-zee' battery wires from 32 gage to 18 gauge. Electrical engineering Learn about electricity, circuit theory, a…
VideoFree3 minutes
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Electrical engineering: Ideal sources
Introduction to the voltage source and current source. Electrical engineering Learn about electricity, circuit theory, and introductory ele…
VideoFree3 minutes
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Electrical engineering: Virtual ground - examples
Using the "virtual ground" idea, we reexamine the inverting op-amp and find a solution much quicker. We apply the virtual ground method to …
VideoFree6 minutes
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Electrical engineering: 5 volt power distribution board
In this video we hack apart a bread board to create a 5 volt power distribution strip. The 5 volts comes from the center pin in the motor c…
VideoFree5 minutes
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Health and medicine: Membrane potentials - part 2
Find out how a cell that is permeable to one ion can become charged (either positive or negative) if there is permeability and a concentrat…
VideoFree9 minutes
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Health and medicine: Signal detection theory - part 1
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: Basics of egg development
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: Henoch-Schonlein purpura
Henoch-Schonlein purpura (also known as anaphylactoid purpura) is a type of vasculitis that affects small blood vessels and characterized b…
VideoFree6 minutes