1. The earth receives about 430 W/m^2 from the sun, averaged over the whole surface, and radiates an equal amount back into space (that is , the earth is in equilibrium). Assuming the earth is a perfect emitter (e=1.0), estimate its averaged surface temperature.
2. A 100-W lightbulb generates a 95W of heat, which is dissipated through a galss bulb that has a radius of 3.0 and is 1.0mm thick. What is the difference in temperature between the inner and outer surface of the glass?
2007-05-09
18:54:17
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2 answers
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asked by
petite fille
2
in
Physics