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Homework Help: What is the ratio of the amplitudes of the two waves?

  1. Dec 4, 2007 #1
    1. The problem statement, all variables and given/known data

    Two earthquake waves of the same frequency travel through the same portion of the Earth, but one is carrying ten times the energy. What is the ratio of the amplitudes of the two waves?

    2. Relevant equations

    I=Intensity
    A=Amplitude
    P=Power

    I=A^2


    3. The attempt at a solution
     
  2. jcsd
  3. Dec 5, 2007 #2

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    You have already written the right eqn, I=A^2.

    I1 = 10*I2.
     
  4. Dec 5, 2007 #3
    I=10

    10=A^2

    SquareRoot(10)=A

    A=3.16
     
  5. Dec 5, 2007 #4

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    Correct.

    A better way to write it would be: reqd ratio = sqrt(ratio of intensities) = sqrt(10) = 3.16.
     
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