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 …
check_box_outline_blank
Class 11 Physics (India): Graphically subtracting vectors
Watch Sal determine which diagram represents vector subtraction graphically. Class 11 Physics (India) Let's learn, practice, and master top…
VideoFree2
check_box_outline_blank
Electrical engineering: Mesh current method (steps 1 to 3)
We solve a circuit by writing Kirchhoff's Voltage Law in terms of "mesh currents." This video covers the first three steps out of four. Ele…
VideoFree9 minutes
check_box_outline_blank
Electrical engineering: Visualizing the Fourier expansion of a square wave
Visualize the Fourier expansion of a square wave. A square wave can be approximated by adding odd harmonics of a sine wave. Electrical engi…
VideoFree4 minutes
check_box_outline_blank
Electrical engineering: Attach Spout's antennae
Electrical engineering Learn about electricity, circuit theory, and introductory electronics. We also have sections that let you get down a…
VideoFree2 minutes
check_box_outline_blank
Class 11 Physics (India): Introduction to limits (old)
An older video of Sal introducing the notion of a limit. Class 11 Physics (India) Let's learn, practice, and master topics of class 11 phys…
VideoFree8
check_box_outline_blank
Class 11 Physics (India): Elastic and non elastic materials
Is steel more elastic than rubber? We all have some intuition for elastic and non-elastic materials. But how do we define elasticity? How d…
VideoFree12
check_box_outline_blank
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
check_box_outline_blank
Class 11 Physics (India): Graph interpretation word problem: temperature
When a function models a real-world context, we can learn a lot about the content from the function's graph. In this video, we consider a g…
VideoFree4
check_box_outline_blank
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
check_box_outline_blank
Class 11 Physics (India): Limits by direct substitution
Sal explains how you can easily find limits of functions at points where the functions are continuous: simply plug in the x-value into the …
VideoFree2
check_box_outline_blank
Electrical engineering: First term in a Fourier series
The first term in a Fourier series is the average value (DC value) of the function being approximated. Electrical engineering Learn about e…
VideoFree7 minutes
check_box_outline_blank
Electrical engineering: Euler's cosine wave
A cosine wave emerges from Euler's Formula. Music, no narration. Animated with d3.js. Electrical engineering Learn about electricity, circu…
VideoFree3 minutes
check_box_outline_blank
Class 12 Physics (India): Diopters, Aberration, and the Human Eye
Let's look at some features of real lenses Class 12 Physics (India) It is now time to dive deeper into the world of physics with topics fro…
VideoFree13 minutes
check_box_outline_blank
Electrical engineering: Construction
You can get started with this simple design, then add your own complexity after! Electrical engineering Learn about electricity, circuit th…
VideoFree1 minute
check_box_outline_blank
Physics: Mirror equation example problems
In this video David solves a few exmaple problems involving concave and convex mirrors using the mirror equation and magnification equation…
VideoFree11 minutes