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Q.

What is the speed of sound in air at 0°C at normal pressure? 

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a

200 m/s

b

332 m/s

c

400 m/s

d

150 m/s

answer is B.

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Detailed Solution

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  • The speed of sound is the distance travelled by sound waves per unit of time. 
    At 0 degree Celsius, the speed of sound in air is around 332m/s.
  • The speed of sound changes with temperature, humidity, and the characteristics of the medium through which sound is propagating. 
    The speed increases by approx. 0.6 m/s for every degree-Celsius increase in temperature.

Therefore, 332 m/s is the correct response.

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