20. What is the pressure at the bottom of the fluid in the container shown in Figure 4.70 if the angle between the container wall and the horizontal is α ? Most of the fluid in this container is not vertically above the bottom surface of the container. Explain how hydrostatic pressure is transferred to that bottom surface in this container.

mercury

_{Figure 4.68} We use the static-pressure relationships to relate pressure in a tank to the various heights of fluids as shown (Problem 17).

_{Figure 4.69} If more top fluid is present on the left than on the right, the initial reading of a double-well manometer is R ₀

(Problem 18).

_{Figure 4.70} A tilted container holds a liquid (Problem 20).

_{Figure 4.71} An irregularly shaped container holds a liquid (Problem 21).

^P in ^P out

^P in ^P out

_{Figure 4.72} Two vessels are constructed and filled with water. We compare the pressure (force/area) near the bottom inside the vessel and the pressure on the solid surface at the bottom of the vessel (Problem 22).

x ₃

x ₁

_{Figure 4.73} Pressure can be calculated in any coordinate system. Problem 23 asks for a calculation in the coordinate system shown.