'' okay today we shall find that ordinary air has a

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Anonymous
2016-03-20 12:03:09 Post No.
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Anonymous 2016-03-20 12:03:09 Post No. [Report]

'' 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''

Anonymous 2016-03-20 12:57:38 Post No.7944687
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Anonymous 2016-03-20 12:57:38 Post No.7944687 [Report]

>>7944648
>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
Most people don't live in vacuum chambers.

Anonymous 2016-03-20 13:02:28 Post No.7944690
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Anonymous 2016-03-20 13:02:28 Post No.7944690 [Report]

>>7944687
i pulled this problem straight out of feynmans lectures, anyway to solve it ?

Anonymous 2016-03-20 13:07:49 Post No.7944693
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>>7944648
define air, define molecule, define distance, define collision, temperature, pressure

Anonymous 2016-03-20 14:16:40 Post No.7944754
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Anonymous 2016-03-20 14:16:40 Post No.7944754 [Report]

>>7944690
wikipedia.com

Anonymous 2016-03-20 15:08:31 Post No.7944812
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Anonymous 2016-03-20 15:08:31 Post No.7944812 [Report]

>>7944690
This is a complete waste of your time, just go look up the constants you need.

'' okay today we shall find that ordinary air has a

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