•a −2.0 nc charge and a +2.0 nc charge are located on the x-axis at and , respectively. a. other than at infinity, is there a position or positions on the x-axis where the electric field is zero? if so, where? b. other than at infinity, at what position or positions on the x-axis is the electric potential zero? c. sketch graphs of the electric field strength and the electric potential along the x-axis.

The answer is orbit around nucleus

Answer(b) 60 miles per hour;

stands for electromotive force and it is measured in volts. despite its name, it is not actually the force in the sense of being a "pushing" or "pulling" (not measured in newtons).an equation that relates emf,  ℰ,  to a battery's terminal voltage, v, current, i, and internal resistance, r, is    ℰ = v + irin this case, the emf can be interpreted as a voltage—a difference in electric potential.i would not say that it would be considered an energy. if emf can be defined as the energy/work per a unit charge from a battery or other electric source, then it is not strictly energy.

If its history of, then b) because a) implies only present day (now)