Juan works at a station that monitors different kinds of data from a volcano. Which of these instrument readings indicates that the volcano might erupt?

Sound energy is produced when an object vibrates. examples are 1- a balloon popping2-a whistle3- a waterfall

Answer choices? if there is any

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.