Water at 10 c enter a 2.54 cm i. d. pipe at a rate of 1.26 l/s. the pipe is 3.05 m long. if the wall temperature is held constant, at 99 c, and the water outlet temperature is 41
c. what is nusselt number for the flow? what nusselt number would you predict on the basis of the colburn analogy?

Velocity is the speed of an object in a certain direction so you'd need to know speed and direction

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.