Velocity of sound in air does not change with the change of?
Correct answer: B. Pressure of air
- A. Temperature of air
- B. Pressure of air
- C. Moisture content in air
- D. Wind in the direction of propagation of sound
Explanation
At a fixed temperature, sound speed in an ideal gas is essentially independent of air pressure because both density and pressure change proportionally. Temperature, humidity and wind can affect the speed measured relative to the ground or the medium.
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