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Rate of energy passing through an area

  1. Nov 30, 2008 #1
    1. The problem statement, all variables and given/known data

    The intensity of an earthquake wave is measured to be 6 x10 ^6 J ms at a distance of 50 km from its source. I calculated the intensity when it passed the point 4 km to source for the first part of this question. The answer was: 9.3750 x 10^8.

    Now I need to know, what is the rate energy passed through an area of 6 ms^2 at 4 k W?

    2. Relevant equations

    3. The attempt at a solution
    I know the answer is NOT 5.4 x 10^7.
  2. jcsd
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