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Supplemental problem: Bernoulli equation requires inviscid fluid for the energy balance. For a simple horizontal pipe (no diameter variation) with steady-state water flow from Point | to Point 2 (which means V1 = V2 and Z; = Z2), which p is larger if viscosity cannot be ignored? Why? (Hint: Think how viscosity effects the energy balance.) If there is a pump in between Point | and 2 to impart energy (Wpump) to the fluid, how would that effect the energy balance? Modify Bernoulli equation to account for the fluid viscosity effect and pump. 1. 1 Pi + spV," + pez * pp + =pV27 + pgz