Consider a hemispherical furnace of diameter D = 5 mwith a flat base. The dome of thefurnace is black, and the base has an emissivity of 0.7. Thebase and the dome of the furnace are maintained at uniformtemperatures of 400 and 1000 K, respectively. Determine thenet rate of radiation heat transfer from the dome to the basesurface during steady operation.

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