Question 9 of 32
1 Point
A moving sidewalk has a velocity of 1.3 m/s north. If a man walks south on
the sidewalk at a speed of 0.9 m/s, how long does it take him to travel 20 m
relative to a stationary observer?
A. 21.9 s
B. 15.45
C. 50.0 s
D. 33.3 s

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.

None. nothing. zero. zilch.