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Homework Help: Longest Wavelengths

  1. Apr 17, 2009 #1
    1. The problem statement, all variables and given/known data

    What are the three longest wavelengths for standing sound waves in a 128-cm-long tube that is (a) open at both ends and (b) open at one end, closed at the other?

    2. Relevant equations

    3. The attempt at a solution

    128 cm because nothing bigger could fit in the tube
  2. jcsd
  3. Apr 17, 2009 #2


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    Homework Helper

    In the fundamental mode of vibration, the wavelength in open pipe is λ/2 and in closed pipe λ/4.
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