A) Faster in dry air than in moist air
B) Directly proportional to pressure
C) Directly proportional to temperature
D) Independent of pressure of air
Correct Answer: D
Solution :
\[v=\sqrt{\frac{\gamma \,P}{\rho }}\]; as P changes, r also changes. Hence \[\frac{P}{\rho }\] remains constant so speed remains constant.
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