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Homework Help: Wave speed

  1. Apr 6, 2004 #1
    a wave moving along the x axis is described by

    y(x,t) = Ae^(-(x+vt)^2/b)

    where x is in meters and t is in seconds. Given A=4m, v=3 m/s, and b=4 m^2.

    Determine the speed of the wave. Answer in units of m/s.

    i tried using partial differentiation with respect to t.
    i got dy/dt = 4e^(-(3(x+3t))/2). I don't know what to do next. Please help.
  2. jcsd
  3. Apr 7, 2004 #2


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    Science Advisor

    Well, you were TOLD that v= 3 m/s !!!!
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