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Anonymous
2016-03-20 12:03:09 Post No. 7944648
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Anonymous
2016-03-20 12:03:09
Post No. 7944648
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'' okay today we shall find that ordinary air has a density of about 0.001 g per - cubic meter, while liquid air has a density of about 1.0 g per -cubic meter
estimate the number of air molecules per cubic meter in ordinary air, nG, and in liquid air nL.
estimate the mass m of an air molecule.
estimate the average distance l an air molecule should travel between collisions at normal temperature and pressure (NTP,20 C at 1 atm).
estimate what pressure p in normal atmospheres, a vacuum system should be operated in order that the mean free path be about one meter.
You should be able to solve this with ease young ambitious undergrads''
