Which one among the following doesn't have any effect on velocity of sound ?
A. Pressure
B. Temperature
C. Humidity
D. Density
Answer: Option A
Solution(By Examveda Team)
Air pressure has almost no effect on sound speed. It has no effect at all in an ideal gas approximation, because pressure and density both contribute to sound velocity equally, and in an ideal gas the two effects cancel out. In an ideal gas, intermolecular gaps are always taken to be very large, regardless of pressure.This Question Belongs to General Knowledge >> Physics
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The speed of sound is independent from pressure while it depends on humidity due to which the speed of sound increases at night time. So the correct answer is pressure not humidity.
The next question 43 is the answer of this question.