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Question: a four surface enclosure is in the shape of a...

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A four surface enclosure is in the shape of a tetrahedron of 2 m edge length. The surfaces are at 1400, 1200, 1000 and 800 K respectively with emissivities of 0.8, 0.7, 0.6 and 0.5. Determine the radiant heat flow from each face.

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