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Homework Help: Waves II. I need help figuring out the harmonics.

  1. Mar 8, 2009 #1
    1. The problem statement, all variables and given/known data
    A steel rod of length 1.44 m is clamped at a point 1/4 of its length from one end. The ends of the rod are free to vibrate. If the velocity of longitudianl wave in steel is 5000 m/s, find the frequency of the first three allowed harmonics. Make diagrams to show the three standing waves.

    2. Relevant equations
    f = (nV) / 2L

    because it has two open ends. Their not actually open but they both are free which means the same thing.

    3. The attempt at a solution

    I have the answers. I'm just clueless as to how you figure out n for each harmonic.

    Shouldn't it just be 1, 2 and 3.

    For some reason my classmates gor 2, 6 and 10.

    And all you have to do is plug it in to find each of the three frequencies.
  2. jcsd
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