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Advanced Physics Homework Help
Kinetic Theory: How many molecules enter pinhole in vacuum?
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[QUOTE="Lagraaaange, post: 5314967, member: 562027"] [h2]Homework Statement [/h2] Pressure in vacuum is 10^-3 Torr. External Pressure is 1atm and 300K. Pinhole of 10^-10cm^2 made in vacuum. Assuming all molecules striking hole pass through, how many molecules leak into vacuum in 1hour? Answer: 10^17 molecules [h2]Homework Equations[/h2] Flux = <v>*N/4V Rate = Flux times A [h2]The Attempt at a Solution[/h2] I can make an DE: dN/dt = <v>N/4V*A and solve this but I have no info on N0, initial molecules. I also don't have volume. So I don't see how to obtain a numerical result. [/QUOTE]
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Kinetic Theory: How many molecules enter pinhole in vacuum?
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