a pendulum is timed first for 20 swings and then for 50 swings . Time for 20nswings : 17.4 seconds .Time for 50 swings : 42.2 seconds . calculate the average time per swing in each case . the answers are slightly different. Suggest some possible experimental reasons for 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.

Answer the above statement is ( false );