First slide

Travelling wave

Question

Velocity of sound in air
I. Increases with temperature
II. Decreases with temperature
III. Increase with pressure
IV. Is independent of pressure
V. Is independent of temperature
Choose the correct answer.

Moderate

A

Only I and II are true
B

Only I and III are true
C

Only II and III are true
D

Only I and IV are true

Solution

Speed of sound $v \propto \sqrt{T}$ and it is independent of pressure.

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