Problem 2: The system show in the diagram below consists of 1200 m of 5 cm cast-iron pipe, two 45 threaded elbows and four 90 smooth bend flanged elbows, a fully open globe valve, and a sharp exit into a reservoir. If the elevation at point 1 is 400 m, what gage pressure is required at point 1 to deliver 0.005 m/s of water at 20 C into the reservoir? . Hints: Select the most applicable version of the three variations of the Bernoulli equation. Find the appropriate values for water at 20 to obtain p, u. Be sure to use the specific loss coefficients for each pipe component. Select the correct & value in the table provided to calculate relative roughness. Elevation 500 m > Sharp exit 45 Open globe 45 Equivalent Roughness, e Feet Millimeters Pipe Riveted steel Concrete Wood stave Cast iron Galvanized iron Commercial steel or wrought iron Drawn tubing Plastic, glass 0.003-0.03 0.001-0.01 0.0006-0.003 0.00085 0.0005 0.9-9.0 0.3-3.0 0.18-0.9 0.26 0.15 0.00015 0.000005 0.0 (smooth) 0.045 0.0015 0.0 (smooth) 2