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JEE Main PAPER - 1

JEE Main · 2018

180 questions · One at a time

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MCQ4 marks

The mass of a hydrogen molecule is 3.32×10−27 kg3.32 \times 10^{-27} \text{ kg}  . If 102310^{23}   hydrogen molecules strike, per second, a fixed wall of area 2 cm22 \text{ cm}^2   at an angle of 45∘45^\circ   to the normal, and rebound elastically with a speed of 103 m/s10^3 \text{ m/s}  , then the pressure on the wall is nearly:

  • A.2.35×102 N/m22.35 \times 10^2 \text{ N/m}^2
  • B.4.70×102 N/m24.70 \times 10^2 \text{ N/m}^2
  • C.2.35×103 N/m22.35 \times 10^3 \text{ N/m}^2Correct
  • D.4.70×103 N/m24.70 \times 10^3 \text{ N/m}^2
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