Consider a horizontally oriented steel pipe (2-nom sch 40 pipe with k = 25 btu/hr) that is lagged with fiberglass insulation (k = 0.02 btu/hr. ft ◦r) that is 1.0 inch thick. the pipe conveys the steam that maintains inside surface temperature at 250 ◦ f. air outside the insulation is at 80 ◦ f. determine the heat loss through the pipe and the insulation. use churchill- chu equation to calculate nu number

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.