The mass of a hydrogen molecule is 3.32 × 10–27 kg. If 1023 hydrogen molecules strike, per second, a fixed wall of area 2 cm2 at an angle of 45° to the normal, and rebound elastically with a speed of 103 m/s, then the pressure on the wall is nearly :
(1) 4.70 × 103 N/m2
(2) 2.35 × 102 N/m2
(3) 4.70 × 102 N/m2
(4) 2.35 × 103 N/m2
