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Homework Help: Velocity of a wave

  1. Jan 15, 2008 #1
    1. The problem statement, all variables and given/known data

    Tsunamis are fast-moving waves generated by underwater earthquakes. In the deep ocean their amplitude is barely noticeable, but upon reaching shore, they can rise up to the astonishing height of a six-story building. One tsunami, generated off the Aleutian islands in Alaska, had a wavelengthh of 650 km and traveled a distance of 3700 km in 4.9 h.
    (a) What was the speed (in m/s) of the wave? For reference, the speed of a 747 jetliner is about 250 m/s.

    2. Relevant equations

    velocity = wavelength*frequency

    3. The attempt at a solution

    I know I need to convert the wavelength to meters so I did that and got 650000m and 4.9 hours equals 17640 seconds, i figured that was the period or T. So then I took 1/T to get the frequency which is 1/17640 and got 5.67E-5...do I need to multiply this with the 650000m to get the velocity? It doesn't seem to make sense?
  2. jcsd
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