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 Form 2 Physics Sound Questions and Answers

A gun is fired and an echo heard at the same place 0.5s later. How far is the barrier, which reflected the sound from the gun? (Speed of sound 330m/s).

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Answer Text:
#2d = t times s#
= #0.5 times 330 = 165m#
#d = 165/2 = 82.5m#