Flame Institute SCF 18 Near Chawla Lights Phase 7 Mohali Chandigarh 9888949978
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  • Flame SCF 18 Near Chawla Lights Ph-7 Mohali 9888949978

56. A given mass of a gas is allowed to expand freely until its volume becomes double.

If Cb and Ca are the velocities of sound in this gas before and after expansion respectively, then Ca is equal to

(a)  2Cb                                   (b) √2 Cb

(c)  Cb                                    (d) (1/√2) Cb

Answer-c

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