Question

the speed of the signal. (Ans. 3 x
ms)
3. A rock under water is 1595 m deep. Find the time in
which an ultrasonic signal returns after reflection
from the rock. Given speed of ultrasonic waves in
water = 1450 ms -1
(Ans. 2.2 s)​

Answer 1

Answer:

Let the velocity of the sonic beam be v.

• Distance=1595 m
• Time taken by the beam to return from rock=1595/v
• Putting v=1450 m/s
• Time=1595/1450 second
• Time=1.1 s

If you are asking the total time taken by the beam to reach the rock and then come back, then,

• Time=2 x time taken to reach the rock
• Time=2.2 s

Answer 2

Answer:

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