Question

What is the speed of sound in dry air?

(a) 331.2 m/s

(b) 300 m/s

(c) 250 m/s

(d) 230 m/s

This question was posed to me in final exam.

I'm obligated to ask this question of Velocity of Sound or Pressure Wave in a Fluid in section Compressible Flow of Fluid Mechanics

Answer 1

The correct option is (a) 331.2 m/s

To elaborate: The speed of sound in dry air at a temperature of zero degrees Celsius is equal to 331.2 m/s. Speed of sound in air is denoted by the symbol ‘c’. Thus the correct answer for the following is 331.2 m/s.