Question

A SONAR device attached to a ship sends ultrasonic waves to a sea.These waves reflected from the bottom of the sea. If the ultrasonic waves take 4s to travel from the ship to the bottom of the sea and back to the the ship, what is the depth of sea?(speed of sounding water=1500m/s)

Answer 1

Answer:

your answer is in this pic

Answer 2

The depth of the sea is 3 km.

Explanation:

The speed of sounding water = 1500 m/s

If the ultrasonic waves take 4s to travel from the ship to the bottom of the sea and back to the the ship, t = 4 s

We need to find the depth of the sea. In SONAR, the total distance covered by the sound is 2d such that,

$2d=vt$

$d=\dfrac{vt}{2}$

$d=\dfrac{1500\times 4}{2}$

d = 3000 m

or

d = 3 km

So, the depth of the sea is 3 km.

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