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
of copper is
.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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