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A boat sounds a fog horn on a day when both the sea water and the air temperature are 25.0° C. The speed of sound in sea water is 1,533 m/s. How much earlier (in s) does a dolphin 1000 m from the source hear the sound than a person in a boat that is also 1000 m distant? (Ignore the time it takes the sound to reach the water surface.) Please show work/ explanations

(A) 0.652
(B) 2.12
(C) 2.24
(D) 2.77
(E) 2.90

Respuesta :

Answer:

C) 2.24 s

Explanation:

Speed of sound in air at 25 degree = 346 m /s

Speed of sound in sea water = 1533 m/s

Time taken by sound to reach dolphin

= 1000 / 1533 = 0.6523 s

Time taken by sound to reach boatman

1000/ 346

= 2.89 s

Difference

= 2.89 - .6523

= 2.24 s

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