Air is contained in a vertical piston-cylinder assembly such that the piston is in static...
Air is contained in a vertical piston-cylinder assembly such that the piston is in static equilibrium The atmosphere exerts a pressure of 101 kPa on top of the 0.8 meter-diameter piston. The gage pressure of the air inside the cylinder is 1.2 kPa.
Subsequently, a weight is placed on top of the piston, as shown below, causing the piston to descend until reaching a new static equilibrium position. At this position, the gage pressure of the air inside the cylinder is 2.8 kPa.
a. What is the mass of the piston, in kg?
b. What is the mass of the added weight, in kg?
Answers: about 60 and 80 kg, respectively. Hint: f you're stuck try drawing a FBD of the piston.
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Air is contained in a vertical piston-cylinder assembly such that the piston is in static...
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Question Two (10 Marks] Air is contained in vertical piston-cylinder assembly fitted with an electrical resistor. The atmosphere exerts a pressure of 1 bar on the top of the piston, which has a mass of 45 kg and a face area of 0.09 m². Electric current passes through the resistor, and the volume of the air slowly increases by 0.45 m while its pressure remains constant. The mass of the air is 0.27 kg. and its specific internal energy increases...
Air is contained in a piston cylinder device that has a
resistance heater inside. The atmosphere exerts a pressure of 100
kpa on the piston of which it has a mass of 45 kg and a transverse
area of 0.9 m². An electric current passes through the resistance
of the air volume slowly increases by 0.45 m³ while the pressure
remains constant. The mass of the air is 0.27 kg and its specific
internal energy increases 42 kJ / kg,...
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Question 1 Air is contained in a vertical piston-cylinder assembly fitted with an electrical heater. The atmospheric pressure is 100 kPa and piston has a mass of 50 kg and a face area of 0.1 m . Electric current passes through the heater, and the volume of air slowly increases by 0.045 m. The mass of the air is 0.3 kg and its specific internal energy increases by 42.2 kJ/kg. Assume the assembly (including the piston) is insulated and neglect...
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