the sound of an explosion on the surface of a lake is heard by a boatman 100m away and a diver 100m below the point of explotion . Of the two persons boatman or diver who heard the sound first.
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DIVER CAUSE SPEED OF SOUND IN WATER(1450) IS FASTER THAN THAT IN AIR(330)
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V=2d÷t
Do the calc to find time for both cases. For the diver it is 0.14 sec while for the man it is 0.58. So diver hears it first
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