Speed of sound in air at 0 degree centigrade is _____ .

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Official Soldier GD Paper : [Punjab Regt Centre, Ramgarh Cantt] - 2020
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  1. 211 mtr/sec
  2. 332 mtr/sec
  3. 350 mtr/sec
  4. 330 mtr/sec

Answer (Detailed Solution Below)

Option 2 : 332 mtr/sec
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Detailed Solution

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The correct answer is 332 mtr/sec.

Key Points

  • Speed of sound
    • The speed of sound is the distance traveled in a given amount of time by sound waves.
    • The speed of sound given as 343 meters per second is observed under a certain set of conditions, specifically, through dry air at 20°C.
    • Sound speeds vary with the temperature of the air, humidity, and even the consistency of the air.
    • Sound has a slower speed at lower temperatures for a given medium.
    • The particles in the medium travel more slowly at a lower temperature, so it takes longer to transfer the energy of the sound waves.
    • The speed of sound decreases by 0.6 m/s for every 1 degree Celsius that the temperature decreases.
    • At 0 degrees Celsius, the speed of sound is around 331.5 m/s. Hence, Option 2 is correct.
    • For each degree-Celsius temperature rise, the speed of sound rises by 0.6 meters per second (m/s).

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