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Homework Help: Power radiated by a sound source

  1. May 27, 2006 #1
    A loud speaker having a circular opening of diameter 20 cm is emitting sound waves uniformly. The intensity of sound at the opening is 0.2 milli watt/m^2. What is the power radiated by the source?
    I solved it in the following way:
    Intensity = power/Area
    Here Area = (pi)R^2
    = 3.14 x 0.01
    = 0.0314 m^2
    Power = 0.2 x 0.0314 milli watts
    = 6.28 x 10^(-6) watts
    Is it right?
  2. jcsd
  3. May 29, 2006 #2
    Please respond.
  4. May 29, 2006 #3

    Andrew Mason

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    Science Advisor
    Homework Helper

    Amith, No one is responding to this because it is trivial. You are saying:

    A/B = x

    And then asking:

    Does A = Bx?

    This is hardly advanced physics.

  5. Jun 6, 2006 #4
    I think what he is saying is:

    Does A/B = x ? In other words, does A = bx ??
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