ENGINEERING APPLICATION State-of-the-art vacuum equipment
Chapter , Problem 64(choose chapter or problem)
ENGINEERING APPLICATION State-of-the-art vacuum equipment can attain pressures as low as \(7.0 \times 10^{-11}\) 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 \(1.0 \times 10^{-10} \ \mathrm m\)
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