The mass of a hydrogen molecule is 3.32 × 10 - 27  kg . If 10 23 hydrogen molecules strike, per…

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

Solution



F=2mnVcosθP=2mnVcosθA

P=2×3.32×10-27×1023×1032×2×10-4

P=2.35×103 N m-2

Asked in: JEE Main 2018 (08 Apr)

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