Question: An electromagnetic wave strikes a 1.30-cm2 section of wall perpendicularly. The rms value of the wave's magnetic field is determined to be 6.80 10-4

An electromagnetic wave strikes a 1.30-cm2 section of wall perpendicularly. The rms value of the wave's magnetic field is determined to be 6.80 × 10-4 T. How long does it take for the wave to deliver 1850 J of energy to the wall?

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