Question: Two parallel planes 9 0 by 6 0 cm are separated by a distance of 6 0 cm . One plane is maintained at a

Two parallel planes 90 by 60 cm are separated by a distance of 60 cm. One plane
is maintained at a temperature of 800 K and has an emissivity of 0.6. The other
plane is insulated. The planes are placed in a large room that is maintained at 290 K.
Calculate the temperature of the insulated plane and the energy lost by the heated
plane.

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