Question: Find the pressure at point 4 of the vertical-plane pipeline drawn in Figure under laminar flow conditions. The pipeline cross-section is circular with an inner diameter di = 30 mm. Known are the pump specific work w = 2 m2 /s2 , l = 10 m, h = 2 m, v0 = 1 m/s, t = 1000 kg/m3 , n = 0.001 N-s/m2 , and the atmospheric pressure pa = 105 N/m2 .
