1. If you have a copper wire resistor with resistivity p = 1.68 x 10^-8 (ohm*m), how long would it have to be to give you a resistance of 145 ohm, if it has a circular cross-section with radius 0.1 mm?
2. Suppose you have a copper wire with a radius 0.7 mm, what is the resistance for a one meter length of wire?
3. For two resistors, R1= 1.15 kOhm and R2= 10.3 kOhm, what would be the equivalent resistance if we add these in series? In parallel?