1.

a sonar use ultrasonic waves after 3 seconds when they are inside the sea water what is the depth of the reflecting object if speed of ultrasonic waves is 15000 metre per second in the sea water​

Answer» ONG>Answer:

45000m is the correct answer

Explanation:

Time TAKEN to TRAVEL back and forth =6sec

Time taken to reach to reach the surface =3 sec

d =v*t

d=15000*3

d=45000m



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