Question

c. The echo-receiver of sonar attached to a ship, receives the echo from the bottom of sea in 2 seconds
Ans.
after the ultrasonic waves were sent into the sea. If the speed of sound in water is 1000 m/s, then what
is the depth of the sea?
(a). 2000 m
(d). 1000 m
(b). 3000 m
(C) 6000 m
Ans.​

Answer 1

Step-by-step explanation:

Time period, t=1.6s

Velocity of sound in sea water v=1400ms

−1

Let d be the depth of the sea,

Then the applying the formula, v=

t

2d

Then, we get

1400=

1.5

2d

d=

2

1400×1.6

=1120m

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