balloon question

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1 total messages Started by Steve Luzader Fri, 10 Feb 1995 03:01

#977

Author: Steve Luzader
Date: Fri, 10 Feb 1995 03:01

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   The pressure inside a balloon is greater than atmospheric pressure
because the total force on the gas inside the balloon is that due to
the external air pressure plus the force due to the stretched rubber
membrane of the balloon itself.  Because of the membrane, the inward
force on the gas in the balloon is greater than that due to the external
air alone.  This is a good place to appeal to the experimental side of
physics, too.  What happens when a balloon is punctured?  Does it just
sit there and quietly collapse, or is there an outward rush of air
from _inside_ the balloon?  We should always encourage our students
(and ourselves) to make observations!

Steve Luzader
Frostburg State University
sluzader@fre.fsu.umd.edu

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