Conduction: 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 0.70 m long. Both sections have a cross-sectional area of 0.00040 m2. The aluminum end and the copper end are maintained at temperatures of 30°C and 170°C, 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?
A. 9.0 W
B. 7.9 W
C. 10 W
D. 11 W
E. 12 W
Answer: A
Physics & Space Science
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