Surface Tension - Part 1: Retreating Pepper

Dr. Boyd introduces surface tension, explaining its effects and demonstrating how soap reduces it. The video includes two demonstrations: one with soap and one without, to show the impact on surface tension. The first demo uses water, dish soap, and pepper to illustrate how soap decreases surface tension, causing pepper to move away. The second demo tests the hypothesis that without soap, the pepper won't move, confirming the role of soap in altering surface tension. The video concludes with a teaser for the next part.

How does the capillary effect relate to surface tension?

What was the hypothesis regarding the effect of the finger without soap on the pepper?