A simple shower for remote locations is designed with a cylindrical tank 500 mm in diamete...

A simple shower for remote locations is designed with a cylindrical tank 500 mm in diameter and 1.800 m high as shown in Fig. 4.22. The water flows through a flapper valve in the bottom through a 75-mm-diameter opening. The flapper must be pushed upward to open the valve. How much force is required to open the valve?

FIGURE 4.22 Shower tank and valve for Problem 4.10.