The temperature coefficient of a certain conducting material is 5.74 × 10-3 (°c)-1. (a) at what temperature would the resistance be 2 times the resistance at 20.0°c? (use 20.0°c as the reference point in .) (b) does this temperature hold for all copper conductors, regardless of shape or size?

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy.work depends on the square of the change in potential energy.work is equal to the negative of the change in kinetic energy.work is equal to the square of the change in kinetic energy