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Double the Pressure

Science brain teasers require understanding of the physical or biological world and the laws that govern it.

 

Puzzle ID:#9895
Fun:*** (2.56)
Difficulty:*** (2.7)
Category:Science
Submitted By:Bobbrt*****
Corrected By:Palsha

 

 

 



In general, if you have a gas in a container and you double the amount of gas, the new pressure will be double the old pressure. I say "in general" because this isn't exactly true, but it is close enough for the purposes of this teaser.
So my question is this: If you have a tire filled with the standard 32 psi and you double the amount of air molecules in the tire, what pressure will your tire gauge now read? Assume that the tire does not expand, and that the first sentence of this teaser is exactly true.

The answer is NOT 64 psi.


Hint

Atmospheric pressure is about 15 psi. How does this affect the answer?
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