Physics

Problem

The mass of a hydrogen molecule is

3.32 \times 10^{-27} \text{ kg}

. If

10^{23}

hydrogen molecules strike, per second, a fixed wall of area

2 \text{ cm}^2

at an angle of

45^\circ

to the normal, and rebound elastically with a speed of

10^3 \text{ m/s}

, then the pressure on the wall is nearly: a.

2.35 \times 10^3 \text{ N/m}^2

4.70 \times 10^3 \text{ N/m}^2

2.35 \times 10^2 \text{ N/m}^2

4.70 \times 10^2 \text{ N/m}^2