A 1-liter glass bulb contains N2gas at room temperature and

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A 1-liter glass bulb contains N2gas at room temperature and atmospheric pressure. The glass bulb, which is to b e used in conjunction with some other

experiment, is itself enclosed in a large evacuated chamber. Unfortunately the

glass bulb has, unbeknown to the experimenter, a small pinhole about 1 0^-5 cm

in radius. To assess the importance of this hole, estimate the time required for

1 percent of the N 2 molecules to escape from the bulb into the surrounding

vacuum

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