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: Option C
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 = 240sqrt{3})m/s