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

question 57

Multiple Choice

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

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