what should be the minimum distance between the source of sound and the reflector in water so that the Echo is heard distinctly speed of sound in air is 14 50 M per second. answer 72.5 m
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velocity =2D/time14oo=2×D/0.1D=
1400×0.1/2=70m
it is your answer.
1400×0.1/2=70m
it is your answer.
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