APFIVE Kinetic Theory of Gas Pressure
A container with a movable piston contains an ideal gas. The gas molecules have an average speed v and mass m. If the piston’s area is A, which expression correctly gives the pressure exerted by the gas on the piston?
A
P = (1/3)nmv²
B
P = (2/3)nmv²
C
P = (1/2)nmv²
D
P = nmv²
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