A Brass Rod with a Length of 10

A brass rod with a length of 10.0 cm is placed end to end with an aluminum rod with a length of 30.0 cm, and this system is placed between a hot temperature of 100 °C and a cold temperature of 10.0 °C. The thermal conductivities of the brass and the aluminum are 100 W/m °C and 230 W/m °C, respectively. The rods have the same cross-sectional area of 20.0 cm². What is the heat flow from the hot temperature to the cold temperature?

A) 55.3 W
B) 65.3 W
C) 70.3 W
D) 78.1 W
E) 85.3 W

Correct Answer:

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