1. A 70-ft-long, 0.5-in.-diameter hose with a roughness of ε = 0.0009 ft is fastened to a water faucet where the pressure is p1. Determine p1 if there is no nozzle attached to the hose and the average velocity in the hose is 6 ft/s. Neglect minor losses and elevation changes.
2. Determine the pressure drop per 100-m length of horizontal new 0.20-m-diameter cast iron water pipe when the average velocity is 1.7 m/s.