Question

- After how much time the echo of the sound produced by SONAR technique
in 3100 m deep sea water will be heard?​

Answer 1

Answer:

The echo of the sound produced by the SONAR technique  in 3100 m deep sea water will be heard after 4.19 sec.

Explanation:

The speed of sound waves in water is about 1480 m/s. The distance between the Sonar and the sea bed is given as 3100 m. So to hear an echo the sound should travel from the Sonar to the sea bed and then reflect back from the sea bed to the sonar. Then the total distance traveled by the sound wave will be 3100 × 2 = 6200 m.

We know the equation:

Speed = Distance / Time

∴ Time taken to hear the echo = Distance / Speed

                                                   = 6200 / 1480

                                                   = 4.19 s