Question

The sound of an explosion on the surface of a lake
is heard by a boat man 100 m away and by a diver
100 m below the point of explosion.
(1) Who would hear the sound first boat man or
diver?
(ii) Give a reason for your answer in part (i).
(ii) If sound takes time t to reach the boat man, how
much time approximately does it take to reach the
diver?
​

Answer 1

Answer:

1) I think diver has heard it first because sound's microwave first hit water and reach till diver

2) t-2

Answer 2

Answer:

(1) Diver will hear the sound first because sound travels faster in liquids             than air.

(2)Done

(3)Speed of sound in air= 346 m/s

    Time taken to reach the boat = 100/346 = 0.28901 seconds

    Speed of sound in water = 1531 m/s

    Time taken to reach the diver = 100/1531 = 0.06531 seconds

         Difference = 0.28901-0.06531

                             = 0.2237 seconds

Hope it helps.

If the answer is helpful please mark it as the brainliest