1. A closed tank contains 1.5 m of SAE 30 oil, 1 m of water, 20 cm of mercury, and an air gap on top. The absolute pressure at the bottom of the tank is 60 kPa. What is the pressure in the air?
2. Consider a circular cylinder of radius R and length L, and in inverted cone (point/tip up) with base radius R and height L. Both cylinder and cone are filled with water and open to the atmosphere. Write a concise, coherent paragraph that explains the hydrostatic paradox: Both containers have the same downward force on the bottom since those bases have the same surface area, even though the cone's volume is only one-third of the cylinder's volume.