Question

The ratio of the speed of sound in nitrogen gas to that in helium gas, at 300 K. is

• A. $\sqrt{(2/7)}$
• B. $\sqrt{(1/7)}$
• C. $(\sqrt{3})/5$
• D. $(\sqrt{6})/5$

Answer 1

Answer: (C)

$(\sqrt{3})/5$

Answer 2

$V = \sqrt{\frac{\gamma RT}{M}} ; \frac{V_1}{V_2} = \sqrt{\frac{\gamma_1 M_2}{\gamma M_1}}$