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post #17 of (permalink) Old 10th July 2008
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Originally Posted by Pat.w View Post
Hi Mike

I think you're not quite getting my drift

Air expands with temperature like any other substance (water's an odd one, but another conversation), lower the temerature it contracts and you can get more of it in a set volume, as you raise it's temperature again it expands.

Imagine putting air in a sealed box at atmospheric pressure. If you then heat the contents of the box by 100 degrees C you will get an increase of pressure of about 10 PSI.
Right, I get you mate I totaly see where you are coming from, if you cool the air, it contracts, you can fit more in a given volume, heated it expands and you can't get the same volume in. I see I see said the blind man!

Cheers for clearing that up for me. Nice one
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