Science Questions

Why are bubbles round?

Sun, 11th Nov 2007

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Question

Joseph asked:

Why are bubbles round?

Answer

Dave: Thatís because a bubble is made up of a very thin layer of water which has soap molecules on the outside and that has surface tension. Itís trying to minimise its area and get as small as possible. The best shape with the smallest surface for a certain volume of air inside is a sphere, so theyíre round.

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