Kinetic Theory of Gas Pressure
An ideal gas is contained within a cylinder sealed by a movable piston. The gas molecules, each of mass m, have an average speed v. If n represents the number of molecules per unit volume, which of the following expressions correctly gives the pressure P exerted by the gas?
A
P = nmv²
B
P = (2/3)nmv²
C
P = (1/3)nmv²
D
P = (1/2)nmv²
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