|Dec8-08, 08:40 AM||#1|
conduction heat transfer mechanisms
[b]1. The problem statement, all variables and given/known data[/b
the ends of a 20cm long,2cm diameter rod are maintained at 0degrees and 100degrees by immersion in an ice-water bath and boiling water. heat is conducted through the rod at 4.5x10^4J/h. of what material is the rod made?
2. Relevant equations
3. The attempt at a solution
i first changed the heat energy conducted into watts which is = J/s
then i found the surface area of the rod
now plug it into Q/dt=k(A/L)dT
with this number i found that the rod is made of ice which has a k value of 1.7 (the closest number) but i checked the back and it suppose to be iron which has a k value of 80.. what did i do wrong?
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