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A girl claps her hands once at a distance 250 m from a vertical cliff. If the temperature in the surrounding is 5oC, how long...

      

A girl claps her hands once at a distance 250 m from a vertical cliff. If the temperature in the surrounding is 5oC, how long does it take for her to hear the echo?

  

Answers


Mutiso
Distance traveled = 250 × 2 = 500 m
Speed of sound = (331.5 m/s at 0o) the speed in air increases at about 0.6 m/s per oC.
Therefore speed at 5oC = 331.5 + (0.6 × 5) = 334.5 m/s
Time taken = distance / speed = 500 / 334.5 = 1.5 seconds.
Mutiso answered the question on October 12, 2018 at 11:50


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