An astronaut is standing on the surface of a planetary satellite that has a radius of 1.74 times 10^6 m and a mass of 7.35 times 10^22 kg. an experiment is planned where a projectile needs to be launched straight up from the surface. what must be the minimum initial speed of the projectile so it will reach a height of 2.55 times 10^6 m above this satellite's surface? (g = 6.67 times 10^-11 n middot m^2/kg^2)

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.