Two events are observed in a frame of reference S to occur at the same space point, the second occurring 1.80 s after the first. In a frame S moving relative to S, the second event is observed to occur 2.15 s after the first. What is the difference between the positions of the two events as measured in S

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.

Motion i think. hope it

I’m not sure about this question