An electromagnetic wave strikes a 147-cm2 section of wall


An electromagnetic wave strikes a 1.47-cm2 section of wall perpendicularly. The rms value of the wave's magnetic field is 8.35 x 10-4 T. How long does it take for the wave to deliver 1110 J of energy to the wall?

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Physics: An electromagnetic wave strikes a 147-cm2 section of wall
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