A heat conducting rod, 1.60 m long and wrapped in insulation, is made of an aluminum section that is 0.90 m long and a copper section that is
long. Both sections have a cross-sectional area of
The aluminum end and the copper end are maintained at temperatures of
and
respectively. The thermal conductivities of aluminum and copper are 205 W/m ∙ K (aluminum) and 385 W/m ∙ K (copper). At what rate is heat conducted in the rod under steady state conditions?
◦ 9.0 W
◦ 11 W
◦ 10 W
◦ 12 W
◦ 7.9 W