A dancer lifts a 400 N ballerina overhead a distance of 1.4 m and holds her there for several seconds. How much work is done during the lift? How much work is done while
holding the ballerina overhead?

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.

Answerthe distance between the two ends of the galaxy is 150,000 light years;

  the answer is don't know.