Question

A sonar device on a submarine sends out a signal and receives
an echo 5 s later. Calculate the speed of sound in water if the
distance of the object from the submarine is 3625 m.​

Answer 1

⭆ Given :-

• Time (t) = 5 sec

• Distance (d) = 3625 m

⭆To find :-

• Speed of sound in water (v) =?

⭆ Solution :-

$\pink{\bigstar}\:{\underline{\boxed{\bf\red{v=\dfrac{2d}{t}}}}}$

$\rm\longrightarrow\:v=\dfrac{2\times\:\cancel{3625}}{\cancel{5}}$

$\rm\longrightarrow\:v=2\times\:725$

$\rm\longrightarrow\:v=1450\:m/s$

Hence,the speed of sound in water will be 1450 m/s .

$\red{\bigstar}\:\underbrace{\bf\:More\:Information}$

➝ SONAR :-SONAR stand for sound navigation ranging.It is a device which is used in the ships to locate rocks,icebergs,submarine,old ship in sea etc.

• It is also used to measure the depth of a sea.

➝ Sound :- sound is a form of energy which produces sensation of hearing.

• It is produced due to vibration.

• Speed of sound increases with increase in temperature.

• Speed of sound depends on elasticity of the medium particles.

• Speed of sound in solid > liquid > gas.