A Metal Rod Is Placed Between Two Temperature Sources So $^{\circ}$

A metal rod is placed between two temperature sources so that heat can flow between them.One temperature is 90.0 $^{\circ}$ C and the other temperature is 25.0 $^{\circ}$ C.The length of the rod is 30.0 cm and the cross sectional area is 10.0 cm².If 15.0 watts of heat flows between the hot temperature and the cold temperature,then what is the coefficient of thermal conductivity for the metal?

A) 69.2 W/m $\bullet$$^{\circ}$ C
B) 58.2 W/m $\bullet$$^{\circ}$ C
C) 50.4 W/m $\bullet$$^{\circ}$ C
D) 46.3 W/m $\bullet$$^{\circ}$ C
E) 44.2 W/m $\bullet$$^{\circ}$ C

Correct Answer:

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