Physics JAMB

Which of the above will affect the velocity of sound in the air?

I. Temperature.
II. Density of air molecules
III. Pressure
IV. Pitch

A. I and II only
B. II and IV only
C. I, II, and IV only
D. I, II, III and IV

Correct Answer:

Option A – I and II only

Explanation

Air pressure has no effect on speed of sound in an ideal gas because pressure and density both contribute to sound velocity equally, the two effects cancel each other out

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