Beer bubble math | Science News



Science News is a nonprofit.

Help us keep you informed.

Math Trek

Beer bubble math

12:50pm, June 10, 2011

The rate of change of bubble volume. If this quantity is positive, the bubble will grow; if it’s negative, it will shrink.

A constant that depends on the temperature and the specific gas in the foam. (The foam on top of a glass of Guinness lasts unusually long because Guinness uses nitrogen in addition to carbon dioxide in its beer. K is smaller for nitrogen, so the bubbles change size more slowly.)

The sum of the lengths of the edges of the surfaces where the bubble intersects other bubbles. For an isolated bubble, E is 0; for a big bubble surrounded by many little bubbles, it is la

This article is only available to Science News subscribers. Already a subscriber? Log in now. Or subscribe today for full access.

Get Science News headlines by e-mail.

More from Science News

From the Nature Index Paid Content