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3. a sphere of metal with emissivity 08880888 is at temperature...

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

###### Question details

A sphere of metal with emissivity 0.888$0.888$ is at temperature 228.1 C in an environment with 15.9 C. The sphere has a radius 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.

W$\text{W}$

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?

cm$\text{cm}$

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?

C${}^{\circ }\text{C}$