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Question: a sphere of metal with emissivity 08880888 is at temperature...

Question details

A sphere of metal with emissivity 0.8880.888 is at temperature 228.1 C228.1 C in an environment with 15.9 C.15.9 C. The sphere has a radius 67.0 cm.67.0 cm..

 

Part 1)

What is the net rate of power loss by the sphere to the environment? Give a positive answer if it loses energy.

 WW

 

Part 2)

If a lump of metal of the same type is now made into a cylinder with a height 4 times its radius, while its temperature (and the surrounding temperature) remains constant, what is the radius of the new cylinder if the rate of heat loss remains the same?

 cmcm

 

Part 3)

The temperature of the sphere in part 1) is now increased so that the net rate of energy loss doubles. What is the new temperature of the sphere?

 CC

 

 

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