.THE SOUND OF A EXPLOSION ON THE SURFACE OF LAKE IS HEARD BY A BOATMAN 100m AWAY AND A DIVER 100m BELOW THE POINT OF EXPLOSION. i)who will hear sound first boatman or diver? why?

Asked by  | 5th Mar, 2013, 12:01: PM

Expert Answer:

time to reach the sound to the boatman=t1=100/340=0.29s
time to reach the sound to the diver=t2=100/v where v is speed of sound in lake water.
as vin lake will be always be greater than the speed of sound in air.
so t2
so the boat man will hear the sound first.

Answered by  | 5th Mar, 2013, 04:09: PM

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