Electrical Circuit

A conductor whose diameter is 0.175 inches has a resistance of 0.5 ohms. The wire is drawn through
a series of dies until the diameter is reduced to 0.8 inches. Assuming the specific resistance of the
material remains constant, what is the resistance of a lengthened conductor?
2. The resistance of a wire is 126.48 ohms at 100 degrees Celsius and 100 ohms at 30 degrees Celsius.
Determine the temperature coefficient of copper at 0 degrees Celsius?