The magnetic field of a plane-polarized electromagnetic wave moving in the z-direction is given by B equals 1.2 cross times 10 to the power of negative 6 end exponent sin open square brackets 2 straight pi open parentheses straight z over 240 minus fraction numerator straight t cross times 10 to the power of 7 over denominator 8 end fraction close parentheses close square brackets in SI units. Find the average power per square meter carried by the EM wave.

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

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luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.