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A sphere has radius 0.30 m, surface emissivity 0.48, and temperature 600 K. Surrounding the...

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A sphere has radius 0.30 m, surface emissivity 0.48, and temperature 600 K. Surrounding the sphere is a concentric spherical shell. The inner surface of the shell has radius 0.90 m, emissivity 1.00, and temperature 400 K. At what net rate and direction is heat radiated across the space between the sphere and the shell? The Stefan-Boltzmann constant is 5.67 x 10-8 W/(m. K4).6.5 kW, inward8.3 kW, outward4.0 kW, outward10.8 kW, inward18.8 kW, outward

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