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How can we do it the other way

  1. Dec 9, 2009 #1
    1. The problem statement, all variables and given/known data

    I was thinking about the problem. There is a bat which is at rest and sends a sound of frequncy of 450 khz. another bat flying towards it hears it as a sound of frequency of 457 hz. i was trying to know the velocity of the second bat using simple physics formula or without using doppler's effect or other phenomena.

    2. Relevant equations
    i tried to do this by using t= 1/f but to say the truth didnt go any farther. and i dont have any idea about the relevancy. may the v=lambda *frequency and t=1/f will help.
    3. The attempt at a solution
     
  2. jcsd
  3. Dec 9, 2009 #2

    AEM

    User Avatar

    Did you look at the equations for the Doppler effect.
     
  4. Dec 9, 2009 #3
    Ya i have solved using doppler effect. i was thinking if it can be used using relative velocity phenomena.
     
  5. Dec 10, 2009 #4
    Have you looked at the derivation of the Doppler formula?
     
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