Question:
The mass of a hydrogen molecule is $3.32 \times 10^{-27} \mathrm{~kg}$. If $10^{23}$ hydrogen molecules strike, per second, a fixed wall of area $2 \mathrm{~cm}^{2}$ at an angle of $45^{\circ}$ to the normal, and rebound elastically with a speed of $10^{3} \mathrm{~m} / \mathrm{s}$, then the pressure on the wall is nearly :
Correct Option: , 4
Solution:
