Question

how long will it take a sonar pulse that travels at the speed of 1,500m/s to return from a sunken ship that is at a depth of 3,750m?

Answer 1

Answer: It will 5 seconds fir the wave to return

Explanation: Speed is expressed as v=d/t if we derive this to find t:

t=d/v =3750m/ 1500m/s = 2.5 s note it the time required for the wave to reach the sunken ship. So multiply it by 2 to to have the final time to reach back on the source which takes 5 s.

Answer 2

Answer:

Correct answer:   t = 5 seconds

Explanation:

Given: sonar pulse velocity v = 1,500 m/s and distance from sunken ship

d = 3,750 m

The sonar pulse must go twice the distance to the ship

2 d = v · t  =>  t = 2 d / v = 2 · 3,750 / 1,500 = 7,500 / 1,500 = 5 seconds

God is with you!!!