In a region of free space, the electric field at an instant of time is vector E = (8 i hat + 2 j hat - 6 k hat) N/C and the magnetic field is vector B = (2 i hat + 1 j hat + 3 k hat) x 10^(-8) T. a) Show that the two fields are perpendicular to each other b) Determine the Poynting vector for these fields

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