Question

The ratio of the velocity of sound in hydrogen (g = 7/5) to that in helium (g = 5/3) at the same temperature is

• A. $\sqrt{\frac{5}{42}}$
• B. $\sqrt{\frac{5}{21}}$
• C. $\frac{\sqrt{42}}{5}$
• D. $\frac{\sqrt{21}}{5}$

Answer 1

Answer: (C)

$\frac{\sqrt{42}}{5}$

Answer 2

v_s µ