A piston with a diameter of 50 cm and a thickness of 5 cm is made of a composite material with a density (ρ) of 4000 kg/m3.
(a) If the outside pressure is 101 kPa, determine the pressure inside the piston-cylinder assembly if the cylinder contains air.
(b) What-if Scenario: What would the inside pressure be if the piston diameter were 100 cm instead?
(c) Would the answers change if the cylinder contains liquid water instead? (1: yes; 2: no)