A cubic box with sides of 20 cm contains 2 × 1023 molecules of helium with a root-mean-square (rms) speed of 200 m/s. The mass of a helium molecule is 3.4 × 10-27 kg

What is the average pressure exerted by the molecules on the walls of the container? A) 3.39 kPa
B) 1.13 kPa
C) 570 Pa
D) 2.26 kPa
E) 9.1 Pa


B

Physics & Space Science

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