Which of the following observations proves that the Earth goes around the Sun and not vice versa? Why were the other observations important discoveries that helped persuade people that the Earth does go around the Sun, along with all the other planets? A. Phases of Venus. B. Moons of Jupiter. C. Sunspots and mountains on the Moon. D. Stellar parallax. E. Retrograde motion.

P

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.

C. the electric current passes from the slip rings, through the brushes, and to the collection device.

I’m not sure about this question