A large body of lava from a volcano has stopped flowing and is slowly cooling. The
Chapter 14, Problem 63(choose chapter or problem)
A large body of lava from a volcano has stopped flowing and is slowly cooling. The interior of the lava is at 1200C , its surface is at 450C , and the surroundings are at 27.0C . (a) Calculate the rate at which energy is transferred by radiation from 1.00 m2 of surface lava into the surroundings, assuming the emissivity is 1.00. (b) Suppose heat conduction to the surface occurs at the same rate. What is the thickness of the lava between the 450C surface and the 1200C interior, assuming that the lavas conductivity is the same as that of brick?
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