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Longitudinal waves

  1. Jun 4, 2009 #1
    1. The problem statement, all variables and given/known data
    a longitudinal wave in a 6.0m long spring has a frequency of 10.0 Hz and a wavelength of 0.75m. calculate the speed of the wave and the time that it would take to travel the length of the spring.


    2. Relevant equations
    v = f (wavelength)


    3. The attempt at a solution
    v = 10(0.75)
    v = 7.5 m/s

    then in order to find the time it would take to travel the length of the spring i have no idea.

    any help is always appreciated
     
  2. jcsd
  3. Jun 4, 2009 #2

    cepheid

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    It travels at 7.5 m/s. The spring is 6.0 m long. So how long does it take to traverse the spring?

    Here's an equivalent question: you are driving a car at 75 km/h. How long does it take you to drive 60 km?
     
  4. Jun 5, 2009 #3
    ah yes. so we are back to the old t = d/v

    that makes very good sense. thank you.
     
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