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Introductory Physics Homework Help
Calculating Mean Free Path of N2 Molecule in UHV Chamber
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[QUOTE="albega, post: 4959727, member: 508013"] [h2]Homework Statement [/h2] What is the mean free path of an N[SUB]2[/SUB] molecule in an ultra-high-vacuum chamber at a pressure of 10[SUP]-10[/SUP]mbar? [h2]Homework Equations[/h2] λ=1/(√2)nσ number density n, collision cross-section σ p=nkT pressure p, temperature T σ=πd[SUP]2[/SUP] d molecular diameter [h2]The Attempt at a Solution[/h2] λ=kT/(√2)πpd[SUP]2[/SUP] where we know p and I can estimate d to be around 10[SUP]-10[/SUP]m. However I am not given T, and I don't really see how I could know what it is... [/QUOTE]
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Calculating Mean Free Path of N2 Molecule in UHV Chamber
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