why do balloons bang when burst?

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paul.fr

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why do balloons bang when burst?
« on: 06/06/2007 09:45:03 »
inflate a balloon, then pop it. you get a rather loud bang, but why?

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Offline lightarrow

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why do balloons bang when burst?
« Reply #1 on: 06/06/2007 12:12:50 »
inflate a balloon, then pop it. you get a rather loud bang, but why?
Air inside the balloon has a greater pressure than air outside, because of the envelope's elasticity that compresses it; so, when the envelope brokes, its own elasticity retracts it very fast and so it frees very fast the air inside. At this moment, the ball of compressed air expands quickly, making the "bang".
« Last Edit: 06/06/2007 12:15:21 by lightarrow »

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Offline Ashtari

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why do balloons bang when burst?
« Reply #2 on: 06/06/2007 12:45:13 »
Paul.fr

Lightning works on the same principle, n'est pas?




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Offline lightarrow

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why do balloons bang when burst?
« Reply #3 on: 06/06/2007 21:05:07 »
Paul.fr
Lightning works on the same principle, n'est pas?
Ashtari
Yes (but there isn't any broken envelope in that case  [;)])