> What is the heat conductivity of dirt, rock, and nickle-iron? Does > anyone one know?
Dirt and rock are similar, in the range 0.2 - 2 W / m K.
Iron is about 84 W / m K
Nickel is 92 W / m K
air at 300K is 0.026 W / m K
Thank you. Am I right in thinking that for air, this is the heat conductivity for still air, and not the heat transfer capabilities of moving air? Robert J. Chassell
Not for nothing, I have my thermodynamics book at work. I'm trying to figure out how long it takes to cool down a can or bottle of beer. Then actual work showed up on my desk.
There was something I read about convection vs. radiation in air. I may get this completely wrong: If there is no convection, radiation is significant, but if there is convection, radiation can be ignored.
Kevin T. - VRWC off to bed for real
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