Question

When the temperature of the air is 50°C, the velocity of a sound wave traveling through the air is approximately

A. 50 m/s.
B. 30 m/s.
C. 361 m/s.
D. 381 m/s.

Answer 1

The answer is letter C. 361 m/s
Hope this helps :)

Answer 2

Due to the variation of the motion of the molecules of air with temperature, the velocity of sound in the air is altered with temperature.
The simplified expression for the calculation of the speed of sound at a given temperature:
v = 331 + 0.6T
v = 331 + 0.6(50)
v = 361 m/s

The correct answer is C.