Part 1. a girl leaves a history classroom and walks 10 meters north to a drinking fountain. then she turns and walks 30 meters south to an art classroom. what is the girl's total distance traveled?

part 2. using the information above from part 1. what is the girl's total displacement from the history classroom to the art classroom?

-- Her total distance is (10m + 30m) = 40 meters.

-- Her displacement from the history classroom is

       (10m north + 30m south)  =  20 meters south .

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.

45 is the correct answer