Answer:
John would hear the sound first because sound travels faster in water than in air
Explanation:
The location of the point of the explosion = On the water surface
The distance between Seema and the sound = 150 m
The medium through which the sound reaches Seema = Through the air
The distance between John and the sound = 150 m
The medium through which the sound reaches John = Through the water
The speed of sound in air = 343 m/s
The speed of sound in water = 1,481 m/s
The time it takes the sound to reach Seema, tₐ = 150 m/(343 m/s) ≈ 0.43732 seconds
The time it takes the sound to reach John, [tex]t_w[/tex] = 150 m/(1,481 m/s) ≈ 0.10128 seconds
The difference in the time it takes sound to reach Seema and John = 0.43732 s - 0.10128 s = 0.33603 s
The sound reaches John approximately 0.33603 seconds before it reaches Seema
Therefore, John would hear the sound first because sound travels about 4.3 times faster in water than in air.
