A) faster in dry air than in moist air
B) directly proportional to pressure
C) directly proportional to absolute temperature
D) independent of pressure changes when temperature remains constant
Correct Answer: D
Solution :
The velocity of sound in air at \[{{\text{0}}^{\text{o}}}\text{C}\] \[=\sqrt{\frac{\gamma RT}{M}}=332\,m/s\] Since, in the formula there is no pressure. Hence, the velocity of sound in air is independent of pressure.
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