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AP EAMCET202125 Aug 2021Morning ShiftPhysicsWaves and SoundActual

Speed of a sound in air

Options

  1. Ais independent of temperature
  2. Bincreases with pressure
  3. Cincreases with increase in humidity
  4. Ddecreases with increase in humidity

Correct answer

C. increases with increase in humidity

Step-by-step solution

Speed of sound in air increases with the increase in humidity in air. The density of water vapour is less than the density of dry air at ordinary temperature, therefore the increase of moisture (humidity) in air decreases the density of air, which increases the speed of sound in air.

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