STANDARD Physics Pressure of Gas MCQ Question
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⁻¹, then the pressure on the wall is nearly
2.35 × 10³ N m⁻²
4.70 × 10³ N m⁻²
2.35 × 10² N m⁻²
4.70 × 10² N m⁻²
Correct Answer
Detailed Explanation
The pressure is calculated using the formula: Pressure = (2 × n × m × v × cos 45°) / Area. Substituting the given values, we find the pressure to be 2.35 × 10³ N m⁻².
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