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Physics - Sound Wave Question with Solution | TestHub

PhysicsSound WaveWavesMedium2 minQB

PhysicsMediumnumerical

Calculate the velocity of sound in air on a day when the temperature is 30°C, pressure 0.74 m of mercury and relative humidity 60%. Velocity of sound at NTP = 330 m/s. Saturated vapour pressure at 30°C = 0.032 m of mercury.

Answer:

349.40

Solution:

Vapour pressure $e = 0.6 \times 0.032 = 0.0192$ m. Dry air at 30°C: $330 303/273 = 347.7$ m/s. Density factor $1 - 0.378 \frac{0.0192}{0.74} = 0.9902$ . $v = 347.7/ 0.9902 = 349.4$ m/s.

Stream:JEESubject:PhysicsTopic:Sound WaveSubtopic:Waves

⏱ 2mℹ️ Source: QB

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