Q486
Speed of sound in air is unaffected by change in
A.
Pressure
AnswerB.
Humidity
C.
Temperature
D.
Volume
Answer: Option A
Solution
Answer: Option A
Solution:
Humidity has little effect on the speed of sound, nor does air pressure by itself. Air pressure has no effect at all in an ideal gas approximation. This is because pressure and density both contribute to sound velocity equally, and in an ideal gas the two effects cancel out, leaving only the effect of temperature.