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

Question

The ratio of the velocity of sound in hydrogen ( γ = 7 5 ) to that helium γ = 5 3 at the same temperature is, 5 42, 5 21, 42 5, 21 5

MARKS App · Accepted Answer

Velocity of sound in a gas v = γ p d ∴ υ H 2 υ H e = γ H 2 × d H e d H 2 × γ H e v H 2 v H e = 7 × 3 × 2 5 × 5 A s d H e d H 2 = 2 ∴ v H 2 v H e = 42 5

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