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The ratio of the velocity of sound in hy...

The ratio of the velocity of sound in hydrogen `( gamma = 7/5)` to that in helium `( gamma = 5/3)` at the same temperature is

A

`sqrt(5/42)`

B

`sqrt(5/21)`

C

`sqrt(42)/5`

D

`sqrt(21/5)`

Text Solution

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The correct Answer is:
C
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