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 Form 2 Physics Sound Questions and Answers

A boy standing in front of a cliff blows a whistle and hears the echo after 0.5s. He then moves 17m further away from the cliff and blows the whistle again. He now hears the echo after 0.6s.Determine the speed of the sound.

 (1m 41s)
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Answer Text:
Distance moved
#17 times 2= 34#
#The speed =34/(0.6−0.5)# =340m/s