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What happens to the resonant frequency of a wine glass as you fill it

  1. Mar 4, 2013 #1
    As you fill a wine glass with water, how does the resonant frequency change?
    Surely it should increase? i did an experiment and it decreased?
    I am so confused!?
    Why does this happen?
     
  2. jcsd
  3. Mar 5, 2013 #2

    NascentOxygen

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    Staff: Mentor

    As you fill a tall glass the sound of the splashing gets higher pitched. The same thing characterizes the filling of a garden watering can, etc. You can gauge how close it is to overflowing by the tone.

    Are you sure you weren't determining wavelength in your experiment?
     
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