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JAMB Physics 2013 Question 27

Question 27

Sound

What is the velocity of sound at 100°C if the velocity of sound at 0°C is 340ms−1?

  1. A.497m−1
  2. B.440m−1
  3. C.397m−1
  4. D.240m−1
Show the answer and explanation

Answer: C (397m−1)

Explanation

The speed of sound is proportional to the square root of the absolute temperature: v = 340 × √(373/273) ≈ 340 × 1.17 ≈ 397 m s−1.