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Tough doppler effect question

  1. Jan 13, 2013 #1
    1. The problem statement, all variables and given/known data

    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


    3. The attempt at a solution
     
  2. jcsd
  3. Jan 13, 2013 #2

    gneill

    User Avatar

    Staff: Mentor

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