Air is contained in a vertical piston-cylinder assembly fitted with an electrical resistor. The atmosphere exerts a pressure of 14.7 lbf/in.² on the top of the piston, which has a mass of 100 lb and a face area of 1 ft². Electric current passes through the resistor, and the volume of the air slowly increases by 1.6 ft³ while its pressure remains constant. The mass of the air is 0.6 lb, and its specific internal energy increases by 18 Btu/lb. The air and piston are at rest initially and finally. The piston-cylinder material is a ceramic composite and thus a good insulator. Friction between the piston and cylinder wall can be ignored, and the local acceleration of gravity is g=32.0 ft/s?. Determine the heat transfer from

A 10-m high cylindrical container with a radius of 2 m is filled with oil and water. If the lower 2.5-m of the tank is water with a density of ρ = 1000 kg/m3 while the rest of the tank is filled with oil with a density of ρ = 800 kg/m3, determine the pressure difference, in kPa, between the top and bottom of the cylinder. Assume that the gravity is 9.81 m/s2.

Determine the mass of weight necessary to increase the pressure of the liquid trapped inside a piston-cylinder device to 127 kPa.Assume the piston to be weightless with an area of 0.10 m2.The outside pressure to be 100 kPa and g=9.81 m/s2.

A rigid tank contains water at a pressure of 200 kPa. The volume of the tank is 2 m^3. The mass of liquid in the tank is 0.5643 kg and the mass of vapor in the tank is 2.2572 kg. In the question that follows, select the answer that is closest to the true value. What is the quality of the water in the tank?