When the temperature of the air is 25°C, the velocity of a sound wave traveling through the air is approximately

A. 347 m/s.

B. 332 m/s.

C. 357 m/s.

D. 320 m/s.

A. 347 m/s

Explanation:

The velocity of sound in dry air varies with temperature as:

v ≈ 331.4 + 0.6 T

where v is velocity in m/s and T is temperature in degrees Celsius.

At T = 25°C:

v ≈ 331.4 + 0.6 (25)

v ≈ 346.4

Closest answer is A, 347 m/s.