Q.

The velocity of sound in air is v and the root mean square velocity of the molecules is c. Then v/c is equal to

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a

γ/3

b

(γ/3)1/2

c

γ/3

d

γ/3

answer is B.

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Detailed Solution

V=γPρ and P=13ρc2 Vc=(γP/ρ)(3P/ρ)=γ31/2
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The velocity of sound in air is v and the root mean square velocity of the molecules is c. Then v/c is equal to