Problem 1 Convert 230 kPa to millimeters of mercury, inches of mercury, and feet of water. Problem 2 A manometer connects an oil pipeline and a water pipeline as shown in Fig. 2.4. Determine the difference in pressure between the two pipelines using the readings on the manometer. Use Soll = 0.86 SH = 13.6. Water 8 cm Water 4 cm 6 cm Mercury Oil Problem3 A 60-cm square gate has its top edge 12 m below the water surface. It is on a 45 angle and its bottom edge is hinged as shown in Fig. 2.7(a). What force P is needed to just open the gate? Hinge Problem 4 Consider the gate in Fig. 2.8 to be a quarter circle of radit 80 cm with the hinge 8 m below the water surface. If the gate is 1 m wide, what force P is needed to hold the gate in the position shown? Problem 5 Find the force P needed to hold the 3-m-wide gate in the position shown in Fig. 2.15(a) if r = 2 m. Fu Air Hinge Problem 6 The gate shown in Fig. 219 will open automatically when the water level reaches a certain height above the hinge. Determine that height if bis: Water Water 60 cm Water Fig. 2.19. Figure 2.8 P Quarter circle radius=r Hinge (a) H Hinge