After a projectile is fired into the air, what is the magnitude of the acceleration in the y direction? (Assume no air resistance.)
O A. 4.9 m/s?
B. 19.6 m/s2
O C. O m/s2
O D. 9.8 m/s2

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.

An atom's smaller negative particles are at a distance from the central positive particles, so the negative particles are easier to move.