Question

The ratio of speed of sound in organ to that in water vapours at any temperature is.
(when molecular weight of organ is 40 gm/mol and for water vapours is 18 gm/mol)
(A)0.75
(B) 0.73
(C)0.68
(D) None of the​

Answer 1

Answer:

0.68

Explanation:

Speed of sound = $\sqrt{\frac{3RT}{Mw} }$

So speed is inversely proportional to $\sqrt{Mw}$

speed in argon / water = $\sqrt{\frac{Mw water}{Mw argon} }$

= 0.68

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