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Frequency Help

  1. May 13, 2008 #1
    1. The problem statement, all variables and given/known data
    While you are standing still you hear the frequency of the wings of a bee as 245 Hz when the bee is moving through the air. If the bee is hovering, the frequency produced is 251 Hz. Is the bee flying toward or away from you? How fast is the bee flying?


    2. Relevant equations

    Not sure. I think:

    [1/(1+ (u/v))]f

    3. The attempt at a solution

    For part 1 I put away from you and for part 2 I put .0163 m/s which I think is wrong.
     
  2. jcsd
  3. May 13, 2008 #2

    hage567

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    Can you show more details of your calculation? What value are you using for the speed of sound?
     
  4. May 13, 2008 #3
    I am using 345
     
  5. May 13, 2008 #4

    hage567

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    You should be getting a higher velocity for the bee. Can you show how you got the 0.0163 m/s? I think you are just going wrong in the algebra somewhere.
     
  6. May 13, 2008 #5
    Oh, I think I know where i messed up. Should it be 5.632
     
  7. May 13, 2008 #6

    hage567

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    That's not what I get. Check your work again.
     
  8. May 13, 2008 #7
    It's a bee how fast can it go?

    I got the same thing again.
     
  9. May 13, 2008 #8

    hage567

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    You are using the numbers you originally posted, right? If so, I don't see how you got 5.6 m/s.
     
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