You have a 1.99-m-long stretched string with a mass of 19.3 g. when you oscillate the string at 440 hz., which is the frequency of the standard a pitch that orchestras tune to, you observe transverse waves with a wavelength of 15.7 cm traveling along the string. calculate the tension in the string.

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.