A.) High-voltage power lines are a familiar sight throughout the country. The aluminum (resistivity = 2.82 x 10-8? m) wire used for some of these lines has a cross-sectional area of 6.0 x 10-4 m2. What is the resistance of 12 kilometers of this wire?
B.) An electric blanket is connected to a 120-V outlet and consumes 110 W of power. What is the resistance of the heater wire in the blanket?