Question

a sonar device on a submarine sends out a signal and receives and echo 5S later calculate the speed of sound in water if the distance of the object from submarine is 3625 M

Answer 1

-time to go = 2.5 seconds
-time to come = 2.5 seconds
-total time = 5 seconds
-distance = 3625 m
-speed of sound in water = distance covered by sound /time.
= 3625/2.5
= 1450 m/s.
;the speed of sound is 1450 m/s

Answer 2

AnswEr:

Given,

• t = 5s

• Distance between submarine object = 3625 m

• Distance travelled by sound = 3625 $\times$ 2 = 1250 m

$\tt \:Speed = \cancel\frac{7250}{5} \\ \\ \tt = 1450 \: m \: per \: sec.$

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$\huge\underline{\tt{SONAR:-}}$

SONAR stands for sound device and navigation and ranging. It is a device which is used to find distance, direction and sound of underwater objects.

• It consists of a transmeter and a receptor or detector installed at the bottom of a ship.

The transmeter produces and transmits ultra - sonic waves. These waves travel through water and after striking the objects on the bottom of the sea are reflected back and received by detector.