Khan Academy: Surface Tension

Surface tension in water, and how the surface tension is related to hydrogen bonding.

This video explains the concepts of surface tension, cohesion, and adhesion. [6:37]

Learn the basics of surface tension and its relationship to hydrogen bonding in this video. [4:30]

Seeing that the surface area to volume ratio of cells generally decreases as cells get larger, making the exchange of resources, waster and heat more and more difficult.

This video introduces the concept of surface tension, and shows how roughness can make a surface superhydrophobic or superhydrophilic. The Wenzel and Cassie-Baxter models are explained. [8:17]

The differences of surface tension between soap and water can really make things go! This video shows some interesting demos illustrating the Marangoni Effect. Two liquids with different surface tensions will result in a surface tension...

This video introduces the concept of surface tension, and shows how roughness can make a surface superhydrophobic or superhydrophilic. The Wenzel and Cassie-Baxter models are explained. [8:17]

What is a catalyst? This Khan Academy resource includes examples of enzymes, acid-base catalysis, and heterogeneous (or surface) catalysis.

Understand that cell size is limited by volume to surface area ratio in this video. Learn that if cells become too big it cannot take in nutrients and get rid of waste fast enough. [8:55]

Find out why the length of a sarcomere (in diastole) affects the amount of force that it can generate (in systole), and how that would look on a graph. Rishi is a pediatric infectious disease physician and works at Khan Academy. [8:50]