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the electromagnetic wave that delivers a cellular phone call to a car has a electric field with an rms value of 4.5e10^-2. the wave passes perpendicularly through an open window, the area of which is 0.15 m^2.

a) what is the intensity of the wave generated by this phone call?

b) how much energy does this wave carry through the window during a 1 minute phone call?

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