Problem 2: 70 points Air is contained in a vertical piston-cylinder assembly fitted with an electrical resistor. The atmospheric pressure is 100 kPa and the piston has a mass of 50 kg and a face area of 0.1 m. Electric current passes through the resistor, and the vol- ume of air slowly increases by 0.045 m. The mass of the air is 0.3 kg and its specific energy increases by 42.2 kJ/kg. As- sume the assembly (including the piston) is insulated and ne- glects the friction between the cylinder and piston, g = 9.8 m/s?. Determine the heat transfer from the resistor to air for a system consisting of: a) the air alone b) the air, and the piston Piston Systern boundary part a Piston System boundary part b L Air