Saved Bookmarks
| 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 |
|