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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Physics: Question 2ab: 2015 AP Physics 1 free response
Physics Learn about the basic principles that govern the physical world around us. Solid understanding of algebra and a basic understanding…
VideoFree12 minutes
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Class 12 Physics (India): PN diode characteristics
A very quick way to look at the behaviour of an electronic device is to look at its characteristics. In this video, we will discuss the VI …
VideoFree7
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Health and medicine: Leukemia diagnosis
Often health care professionals conduct a variety of blood tests to determine if someone has leukemia. Leukemia patients often have decreas…
VideoFree10 minutes
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Health and medicine: Psychoactive drugs: Stimulants
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree3 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: Biological basis of depression
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: Putting it all together: Pressure, flow, and resistance
See how pressure, flow, and resistance relate to one another and how they each affect the human body. Rishi is a pediatric infectious disea…
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: RC step response - intuition
An RC circuit responds to a step of voltage with a smooth transition between the starting and ending voltage. The RC step response is a fun…
VideoFree10 minutes
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Electrical engineering: What is inside a DVD player? (2 of 5)
In this video we explore the power supply inside a DVD player. Electrical engineering Learn about electricity, circuit theory, and introduc…
VideoFree5 minutes
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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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Physics: Pith ball electroscope
Primitive device for measuring electrostatic force Physics Learn about the basic principles that govern the physical world around us. Solid…
VideoFree1 minute
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Health and medicine: What is coronary artery disease?
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoFree14 minutes
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Physics: Compass build (stroke direction)
Does the direction which we stroke the needle determine the final orientation? Physics Learn about the basic principles that govern the phy…
VideoFree1 minute
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Health and medicine: Type 1 and type 2 muscle fibers
Skeletal muscle fibers can be categorized into two types: slow-twitch (Type I) and fast-twitch (Type II). Type I muscle fibers are more eff…
VideoFree9 minutes