A metal sphere with radius 3.20 cm is suspended in a large
Chapter 17, Problem 17.108(choose chapter or problem)
A metal sphere with radius 3.20 cm is suspended in a large metal box with interior walls that are maintained at 30.0C. A small electric heater is embedded in the sphere. Heat energy must be supplied to the sphere at the rate of 0.660 J>s to maintain the sphere at a constant temperature of 41.0C. (a) What is the emissivity of the metal sphere? (b) What power input to the sphere is required to maintain it at 82.0C? What is the ratio of the power required for 82.0C to the power required for 41.0C? How does this ratio compare with 24 ? Explain.
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