An electromagnetic wave strikes a 169-cm2 section of wall
An electromagnetic wave strikes a 1.69-cm2 section of wall perpendicularly. The rms value of the wave's magnetic field is4.84 x 10-4 T. How long does it take for the wave t odeliver 1120 J of energy to the wall?
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an electromagnetic wave strikes a 169-cm2 section of wall perpendicularly the rms value of the waves magnetic field
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