Molecules of a gas strike a target of area at an angle of to the normal and rebound…

PHYSICS · Single correct · CBSE · Physics · Laws of Motion · Laws of Motion

Problem

10^{23}

molecules of a gas strike a target of area

1\,\text{m}^2

at an angle of

45^\circ

to the normal and rebound elastically with speed

1\,\text{km s}^{-1}

. The impulse normal to the wall per molecule is given the mass of one molecule is

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

. (a)

4.7\times10^{-24}\,\text{kg m s}^{-1}

(b)

7.4\times10^{-24}\,\text{kg m s}^{-1}

(c)

3.32\times10^{-24}\,\text{kg m s}^{-1}

(d)

2.33\,\text{kg m s}^{-1}