Thread: Are we allowed to use helium?
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Unread 30-03-2013, 12:09
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Re: Are we allowed to use helium?

Al,

A 1 mil thick sheet of Mylar weighs about 5*10-5 pounds per square inch. So the pressure inside a partially-filled Mylar balloon would be about 0.00005 psi greater than atmosphere. Is that what you are arguing about here?


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