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48. At a given temperature if

Vrms is the root mean square velocity of the molecules of a gas and  the  Vs velocity of sound in it, then these are related as [γ =( CP/Cv)]

(a)  Vrms  =Vs                        (b) Vrms  = √(3/γ)Vs

(c)  Vrms  = √(γ/3)Vs                     (d) Vrms  = (3/γ)Vs

Answer-b

(11)

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