Liquefied natural gas (lng) in a vertical storage tank has a density of 455 kg/m3. the depth of lng in the tank is 2.00 m, and the absolute pressure of the air inside the tank above the upper surface of the lng is 1.22×105pa. what is the absolute pressure at the bottom of the tank?

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?