The molecular weights of helium and oxygen are 4 and 16 respectively at `27^(@)C`. What will be the ratio of velocity of sound in helium `(gamma = 5//3)` to oxygen `(gamma = (7)/(5))` ?

Explanation

To find the ratio of the velocity of sound in helium to that in oxygen, we will use the formula for the velocity of sound in a gas, which is given by:

\[ v = \sqrt{\frac{\gamma R T}{M}} \]

where:
- \( v \) is the velocity of sound,
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