5. An aluminum wire has a resistance of 20.0 Q at 20.0' C. When the wire is warmed in and oven the resistance increases to 46.5 0. What is the temperature of the oven? (Resistivity of aluminum is 2.8 x 10# Qm, temperature coefficient of resistivity for aluminum is 3.9 x 103 "C.!) 6. At 20' C the carbon resistor in an electric circuit connected to a 6.0 V has a resistance of 200.0 0. What is the current in the circuit when the temperature of the carbon rises to 80" C? (Resistivity of carbon is 3.5 x 10 s Qm, temperature coefficient of resistivity for carbon is - 0.50 x 103 "C.1)