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: Lorentz transformation derivation part 1
Using symmetry of frames of reference and the absolute velocity of the speed of light (regardless of frame of reference) to begin to solve …
VideoFree11 minutes
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Class 11 Physics (India): The derivative of x² at x=3 using the formal definition
Sal finds the limit expression for the derivative of f(x)=x² at the point x=3 and evaluates it. Class 11 Physics (India) Let's learn, pract…
VideoFree8
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Class 11 Physics (India) - Hindi: Recognizing force vectors for pendulum (Hindi)
Recognizing force vectors for the pendulum and finding the centripetal force. Class 11 Physics (India) - Hindi To help students who prefer …
VideoFree3
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Physics: Mechanical advantage (part 2)
More on mechanical advantage, levers and moments. Physics Learn about the basic principles that govern the physical world around us. Solid …
VideoFree7 minutes
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Class 11 Physics (India): The force of tension
David explains what the force of tension is, how to solve for it, and some common misconceptions involving the force of tension. Class 11 P…
VideoFree14 minutes
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Class 11 Physics (India): When the source and the wave move at the same velocity
What happens when both the listener and the source are moving together? Class 11 Physics (India) Let's learn, practice, and master topics o…
VideoFree8 minutes
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Electrical engineering: Design review (calibration)
Final step in the coin detector challenge Electrical engineering Learn about electricity, circuit theory, and introductory electronics. We …
VideoFree4 minutes
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Electrical engineering: Spider's LED eyes
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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Electrical engineering: Motor controller connection to Arduino
In this video we show you how to determine which wire is which and how to connect them to your Arduino. Electrical engineering Learn about …
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: Motor controller connections
In this video we show you how to attach and wire the L-298 motor controller board to Bit-zee's frame. Electrical engineering Learn about el…
VideoFree7 minutes
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Electrical engineering: Bumper switches
In this video we create and wire Bit-zee's bumper switches Electrical engineering Learn about electricity, circuit theory, and introductory…
VideoFree10 minutes
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Electrical engineering: Spider's click n' stick
In this video we show you how to hack a click n' stick tap light to make a body for Spider Electrical engineering Learn about electricity, …
VideoFree4 minutes
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Electrical engineering: Fourier coefficients for cosine terms
Fourier coefficients for cosine terms Electrical engineering Learn about electricity, circuit theory, and introductory electronics. We also…
VideoFree6 minutes
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Electrical engineering: AC analysis superposition
We break a sinusoidal input voltage into two complex exponentials. Using superposition, we can recover the complex output signals and reass…
VideoFree7 minutes