Question

The speed of sound in seawater is 1470 m/s. A dolphin sends out a click that reflects off of an

object 150.0 m away. How long does it take from the initial click for the echo to return to the
dolphin?

Answer 1

Answer: 0.204 s

Step-by-step explanation:

The speed of sound
`V` is defined as the distance traveled
`d` in a especific time
`t`:

`V=(d)/(t)`

Where:

`V=1470 m/s` is the speed of sound in seawater

`t` is the time the sound wave travels from the dolphin and then returns after the reflection

`d=2(150 m)` is twice the distance between the dolphin and the object to which the sound waves are reflected

Finding
`t`:

`t=(d)/(V)`

`t=(2(150 m))/(1470 m/s)`

Finally:

`t=0.204 s`