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Part A A 1.50 m cylindrical rod of diameter 0.550 cm is connected to a power supply that maintains a constant potential difference of 17.0 V across its ends, while an ammeter measures the current through it. You observe that at room temperature (20.0" C) the ammeter reads 18.6 A, while at 92.0C it reads 17.4 A. You can ignore any thermal Find the resistivity for the material of the rod at 20.0" C. expansion of the rod. Express your answer in ohm-meters. For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of Temperature dependence of resistance. VO AEQ ? p= n . m Submit Request Answer A Part B Find the temperature coefficient of resistivity at 20.0 C for the material of the rod. Express your answer in reciprocal degrees Celsius to two significant figures. AEQ ? (C)-1 Submit Request