Which of the following statements is/are true?
A. The total mechanical energy of a system, at any one instant, is either all kinetic or all potential energy.
B. The total mechanical energy of a system is equally divided between kinetic and potential energy.
C. Mechanical energy can be dissipated to nonmechanical forms of energy.
D. The total mechanical energy of a system is constant only if conservative forces act.
E. The total mechanical energy of a system is constant only if nonconservative forces act.

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.

Wavelength = pie*69+69 with ur mom

Since the pully is a simple machine so the mechanical advantage is a 1