Reading glasses with a power of 1.25 diopters make reading a book comfortable for you when you wear them 1.8 cmcm from your eye. Part A If you hold the book 32.0 cmcm from your eye, what is your nearpoint distance

The answer is d) by requesting advice on science internet sites

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.