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

Physics
JAMB 2002

I. Temperature.
II. Density of air molecules
III. Pressure
IV. Pitch
Which of the above will affect the velocity of sound in the air

  • A. I and II only
  • B. II and IV only
  • C. I,II and IV only
  • D. I,II,III nad IV
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Correct Answer: Option A
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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