In every exercise, you must highlight your main assumptions, highlight the given data and unknowns, draw a sketch, present your equations in full form, and specify the units in every step. A brief discussion of your findings is encouraged.

2. It is required to connect a shower to a solar-heated water tank. The water is at 40 C and the flow is gravity driven. The system includes 20 m of 1.5-cm-diameter galvanized iron piping with four miter bends (90) without vanes and a wide-open globe valve. If water is to flow at a rate of 0.7 L/s through the shower head, determine how high the water level in the tank must be from the exit level of the shower. Disregard the losses at the entrance and at the shower head and, neglect the effect of the kinetic energy correction factor.