The velocity of a sound wave at 27 o C is 360ms -1 . Its
PHYSICS
JAMB 1998
The velocity of a sound wave at 27oC is 360ms-1. Its velocity at 127oC is
- A. 120?3 ms-1
- B. 240 ms-1
- C. 240?3 ms-1
- D. 720?3 ms-1
Correct Answer: C. 240?3 ms-1
Explanation
Velocity \(\alpha \sqrt{temperature}\)
\(\frac{V_1}{V_2} = \sqrt{\frac{T_1}{T_2}}\)
therefore, \(\frac{360}{V_2} = \sqrt{\frac{27 + 273}{127 + 273}}\)
\(V_2 = 240\sqrt{3}\)m/s
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