An electromagnetic wave strikes a 3.00-cm2 section of wall perpendicularly. The rms value of the wave's magnetic field is determined to be 6.00 10-4 T. How long does it take for the wave to deliver 1000 J of energy to the wall?

Answer 1

Figured it out.
E/SA=t

1000/[(2.38e14*B^2)*(Area)]= t