2 A graph is made of the velocity versus time of a plane as it flies from San Francisco to the Kahului Airport on Maui. Explain how the displacement of the plane be calculated from the graph.

It should be d if not then c

B) raising the temperature and reducing the volume of the gas.|-/ 

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.