A cubic box with sides of contains molecules of helium with a root-mean-square speed of

PHYSICS · Single correct · CBSE · Physics · Kinetic Theory · Kinetic Theory

Problem

A cubic box with sides of

20.0\,\text{cm}

contains

2.00\times10^{23}

molecules of helium with a root-mean-square speed of

200\,\text{m s}^{-1}

. The mass of a helium molecule is

3.40\times10^{-27}\,\text{kg}

. What is the average pressure exerted by the molecules on the walls of the container? (a)

3.39\,\text{kPa}

(b)

1.13\,\text{kPa}

(c)

570\,\text{Pa}

(d)

2.26\,\text{kPa}