3. For the system shown the following Figure, the diameter at section 1 is 12 -in, and that at section 2 is 4 -in. the flow rate through the pipe is 2.0cfs, and the pressure at section 1 is 100 psi. What is the pressure in the constriction at section 2? [Answer: 96.48 psi] P1+2gV12=P2+2gV22 V= flow velocity, m/s) or (ft/S) P= pressure g= accleration due to graviity, 9.8m/s or (32.2ft/s) V (gamma) = unit weight of water, 9.8kN/m3(62.4lbbt/ft3) [Hint: the pressures are multiplied by 144in2/ft2 to [Hint: the pressures are multiplied by 144in2/ft2 to convert from psi to lb/ft2 to be consistent with the units for w; the energy head terms are in feet of head.]