Wave Motion 3 Question 7

7. The ratio of the velocity of sound in hydrogen gas (γ=75) to that in helium gas (γ=53) at the same temperature is 21/5.

(1983, 2M)

Analytical & Descriptive Questions

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Answer:

Correct Answer: 7. F

Solution:

  1. vsound =γRTMvH2vHe=γH2/MH2γHe/MHe=(7/5)/2(5/3)/4=4225


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