Question

A dolphin in seawater at a temperature of 25°C emits a sound wave directed toward the ocean floor 154 m below. How much time passes before it hears an echo? (The speed of sound in ocean water is 1533 m/s.)

Answer 1

Answer:

0.2s

Explanation:

SO for the dolphin to hear its echo, the sound wave must travel a distance twice as much as the displacement between the dolphin and the ocean floor. So d = 154 * 2 = 308 m

Since the speed of sound in ocean floor is v = 1533m/s we can find out the time by dividing the distance d by the speed of sound

t = d / v = 308 / 1533 = 0.2s

Answer 2

$(t = d / v )$The time passes before it hears an echo is 0.3secs

What is sound wave?

A sound wave  servers patterns of disturbance caused by the movement of energy traveling through a medium.

The speed of sound in ocean floor was given as $( v = 1533m/s)$

To find the time, we can make use if the formula

$(t = d / v )$

Where t= time

v= velocity

d= distance

Then substitute ,we have

$= 308 / 1533 = 0.2s$

Learn more about sound wave at;

https://brainly.com/question/1199084