physics

The electromagnetic wave that delivers a cellular phone call to a car has a magnetic field with an rms value of 1.90 10-10 T. The wave passes perpendicularly through an open window, the area of which is 0.20 m2. How much energy does this wave carry through the window during a 35-s phone call?

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asked by sarah
  1. Are you related to "jay"?
    Refer to my later answer to the same question, at:
    http://www.jiskha.com/display.cgi?id=1332827138

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    posted by drwls

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