Quote:
Originally posted by Zooksport2
A co worker (17 YO) once inflated a truck tyre to half normal pressure prior to putting it onto the back of a ute, then proceeded to pump it up to the full pressure. Stupid me, I asked Why? His answer.... So that it would be lighter, and therefore easier to lift onto the back of the ute.
....I see. The greater the air pressure, the heavier the object.
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Zook - I hate to be a stickler, but air really does have weight, and the more of it in a pressurized container the heavier it will be.
see....
http://users.hubwest.com/hubert/mrscience/science7.html
for an explanation. Apparently 1.2 grams per liter.