Consider the diffuse, gray, four-surface enclosure with all sides equal as shown. The temperatures of three surfaces are specified, while the fourth surface is well insulated and can be treated as a reradiating surface. Determine the temperature of the reradiating surface (4).

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T= 700 K, e, = 0.7 T = 500 K, ez = 0.5 Ty= 300 K. E = 0.3