State-of-the-art vacuum equipment can attain pressures as low as 7.0 X 10-11 Pa. Suppose that a chamber contains helium at this pressure and at room temperature (300 K). Estimate the mean free path and the collision time for helium in the chamber. Assume the diameter of a helium atom is 1.0 X 10-10 m.

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Dear student, the solution is as: ell = frac{k_{rm B}T}{sqrt 2 pi... View the full answer