A heat conducting rod,1.40 m long,is made of an aluminum section that is 0.50 m long and a copper section that is
long.Both sections have cross-sectional areas of
The aluminum end and the copper end are maintained at temperatures of
and
respectively.The thermal conductivity of aluminum is 205 W/m ∙ K of copper is 385 W/m ∙ K.The rate at which heat is conducted in the rod is closest to
A) 20 W.
B) 18 W.
C) 23 W.
D) 25 W.
E) 28 W.
Correct Answer:
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