Khan Academy: Tension in the Muscles

In this video, Sal Khan figures out the tension in the wire connecting the two masses. Then he figures out how much we need to accelerate a pie for it to safely reach a man's face. [9:28]

This video lesson from Khan Academy is intended for students who are taking the AP Chemistry course. The relationship between Gibbs free energy, standard Gibbs free energy, and the reaction quotient Q. Predicting the direction of the...

This article from Khan Academy provides information about refraction in water. This information is intended for high school physics students.

This article from Khan Academy provides information about mirrors. This information is intended for the Class 12 Physics Course (India).

Discover surface tension in water, and learn how surface tension is related to hydrogen bonding. [4:31]

Find out what makes smooth muscle, cardiac muscle, and skeletal muscle similar and different from one another. Rishi is a pediatric infectious disease physician and works at Khan Academy.

The second part to a complicated problem. We figure out the tension in the wire connecting two masses. Then we figure our how much we need to accelerate a pie for it to safely reach a man's face. [9:28]

Get an introduction to tension with this video lecture! Understand how to solve for the tension(s) in a set of wires when a weight is hanging from them. [10:20]

Understand how variation can be introduced into a species. [19:52]

Use this tutorial to explore equilibrium reactions and constants. [14:50]