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Homework Help: How does power relate to intensity?

  1. Dec 11, 2005 #1
    In this problem you will use the decibel scale to analyze a small firecracker that emits 1200 W of peak power.

    How does I(the intensity) relate to 1200 peak power?

  2. jcsd
  3. Dec 12, 2005 #2


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    Science Advisor
    Homework Helper

    Intensity is power per unit area.
  4. Dec 12, 2005 #3
    Oh, I think I figured it out, the area is the area of the sphere, not a circle!
    Isn't it right?
  5. Dec 12, 2005 #4


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    Gold Member

    The surface area you mean?
  6. Dec 12, 2005 #5
    P/A where A is the area of a sphere! isn't it?
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