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

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

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Distance traveled = 250 × 2 = 500 m
Speed of sound = (331.5 m/s at 0^o) the speed in air increases at about 0.6 m/s per ^oC.
Therefore speed at 5^oC = 331.5 + (0.6 × 5) = 334.5 m/s
Time taken = distance / speed = 500 / 334.5 = 1.5 seconds.

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Mutiso answered the question on October 12, 2018 at 11:50

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