Calculating Velocity and Direction Using the Doppler Effect

[vishnu manoj]

Homework Statement

An engineer at an underwater military station listens for submarines by sending an ultrasound sonar ping
that has a frequency of 3.75 MHz.

A second ping returns with a frequency of 3.80 MHz, indicating that the object is now moving. What is the
object’s velocity? In which direction is it moving relative to the listening station? Hint: The direction of sound
reverses after the sound reflects off the moving object.
It uses the doppler effect equation. simple yet detailed explanations will be good

The Attempt at a Solution

 

[gneill]

You have to show an attempt so that we can know how to help. What equations and constants are relevant?