Astar is located at < 3×1010, 7×1010, 2×1010 > m. a planet is located at < - 5×1010, - 4×1010, 7×1010 > m. what is the vector pointing from the star to the planet? (in vector form) what is the vector r→ps pointing from the planet to the star?

The answer is a.  i hope this

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.