(October 5, 2009 at 9:27 am)fr0d0 Wrote: LOL So the air escaping a body means diddly squat because ar pressure already factors in the zero reading unless we're in a vacuum and the air escaping the body also escapes the vacuum
I don't quite know what you mean about a vacuum, but yeah. If you weigh yourself having breathed out, then weigh yourselves with inflated lungs, the weight is the same, because the air in your lungs is at equilibrium with the air surrounding you.
If you were to breathe helium, it would have an effect on your weight (because a constant volume of helium at constant pressure weighs less than that volume of air at that pressure). And make your voice sound funny too
Galileo was a man of science oppressed by the irrational and superstitious. Today, he is used by the irrational and superstitious who claim they are being oppressed by science - Mark Crislip
