Question

a ship uses pulses of sound to measure the depth of the sea beneath the ship. A sound pulse is transmitted into the sea and the echo from the sea bed is received after 54 ms. The speed of sound in seawater is 1500 m/s. Calculate the depth of the sea beneath the ship

Answer 1

Answer is 750 m.. Hope u understand.. pls mark me brainliest

Answer 2

Given: The echo from the sea bed is received after 54 ms and the speed of sound in seawater is 1500 m/s.

To find: The depth of the sea beneath the ship.

Solution:

• The speed of the sound pulse in seawater is 1500 m/s.
• The echo from the sea bed is received after 54 ms (millisecond), so the time taken is half of 54 ms.
• Hence, the time taken is 27ms, that is, $27 * 10^{-1} s$.
• The depth of the sea is the distance travelled by the sound pulse.
• According to the speed formula,

        $Speed = \frac{distance}{time}$.

• So, $Depth = speed * time$

              $Depth = 1500 m/s * 27 * 10^{-1} s$

                         $= 4050 m$.

• Therefore, the depth of the sea beneath the ship is 4050 m.