Question

The velocity of sound in air is 330 m/s. The r.m.s. velocity of air molecules (g = 1.4) is approximately equal to –

• A. 400 m/s
• B. 471.4 m/s
• C. 231 m/s
• D. 462 m/s

Answer 1

Answer: (B)

471.4 m/s

Answer 2

= $\sqrt { \frac { \gamma } { 3 } }$ \ = $\frac { 3 } { \gamma }$ × v_s