The physics behind why your tea dribbles down the cup
In short: Ever wondered why a pour often ends in a mess? This video explores the 'teapot effect,' explaining the hidden struggle between surface tension and gravity that causes liquids to cling to container edges.
The video breaks down the 'teapot effect' by examining the tug-of-war between adhesion and cohesion. It explains how intermolecular forces and surface tension cause liquids to run down the side of a container rather than pouring cleanly.
You will learn how pouring speed and angle influence the flow, and why a sharp-edged spout is more effective at preventing spills than a smooth rim. The explainer also demonstrates how adhesion creates a meniscus in a test tube and the conditions required for gravity to finally overcome adhesive forces.
Opens the Intellect+ feed with this card first. Swipe up for the next one.
Sources
- Summary by Intellect · source: Why Do Drinks Always Run Down the Side of the Cup?
To cite this card, link to https://intellectplus.co.uk/app/science-why-do-drinks-always-run-down-the-side-of-the-cup.
How we source, check and correct cards: Editorial standards.
General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.
Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?
Related
More in Physics · More in Science · Latest · A–Z · All topics
