# A Sonar Station Picks up a Return Signal After 3 Seconds. How Far Away is the Object ? (Speed of Sound in Water = 1440 M/S). - Science

Short Note

A sonar station picks up a return signal after 3 seconds. How far away is the object ? (Speed of sound in water = 1440 m/s).

#### Solution

We have to calculate the depth using a sonar signal.
Given: Time taken to listen to the return signal t = 3 s
So time taken to reach the depth (t_D) = 3/2 s
Speed of sound in water ν = 1,440 m/s
So the depth can be calculated as
= ν × tD
= 1440 × 1.5 m
= 2160 m

Concept: SONAR
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#### APPEARS IN

Lakhmir Singh Science Class 9 Physics
Chapter 5 Sound
Long Answers | Q 67.2 | Page 208