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Oxygen at 300 kPa, 100C is in a piston/cylinder arrangement Oxygen at 300 kPa, 100C is in a piston/cylinder arrangement with a volume of 0.1 m3. It is now compressed in a polytropic process with exponent, n 1.2, to a final temperature of 200C. Calculate the heat transfer for the process. Is this the question […]

Two cylinders are filled with liquid water Two cylinders are filled with liquid water, ? = 1000 kg/m3, and connected by a line with a closed valve. A has 100 kg and B has 500 kg of water, their cross-sectional areas are AA = 0.1 m2 and AB = 0.25 m2 and the height h […]

Hi I saw one of your solutions that were uploaded for 20.00 and wanted to know if this was the compl Hi I saw one of your solutions that were uploaded for 20.00 and wanted to know if this was the completed answer for the entire question. The one that I needed was the ACT300 […]

Refrigerant-134a enters the compressor of a refrigerator Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 MPa and -10째C at a rate of 0.12 kg/s, and it leaves at 0.7 MPa and 50째C. The refrigerant is cooled in the condenser to 24째C and 0.65 MPa, and it is throttled to 0.15 MPa. […]

Refrigerant-134a enters an adiabatic compressor as saturated vapor at 30 Refrigerant-134a enters an adiabatic compressor as saturated vapor at 30 psia at a rate of 20 ft3/min and exits at 70 psia pressure. If the isentropic efficiency of the compressor is 80 percent, determine (a) the actual power input and (b) the second-law efficiency of […]

In an experiment to learn if substance A can help alzheimer’s patients, t In an experiment to learn if substance A can help alzheimer’s patients, the brains of 40mice were treated to damage their memories. Themice were trained to run a maze. After a day, 20 mice were given substanceA and 17 of these completed […]

Refrigerant-134a enters an adiabatic compressor as saturated vapor at 120 kPa at a rate of 0.3 Refrigerant-134a enters an adiabatic compressor as saturated vapor at 120 kPa at a rate of 0.3 m3/min and exits at 1-MPa pressure. If the isentropic efficiency of the compressor is 80 percent, determine (a) the temperature of the refrigerant […]

Two cylinders are connected by a piston as shown Two cylinders are connected by a piston as shown in Fig. P2.85. Cylinder A is used as a hydraulic lift and pumped up to 500 kPa. The piston mass is 25 kg and there is standard gravity. What is the gas pressure in cylinder B? Is […]

Refrigerant-134a enters the condenser Refrigerant-134a enters the condenser of a residential heat pump at 800 kPa and 35째C at a rate of 0.018 kg/s and leaves at 800 kPa as a saturated liquid. If the compressor consumes 1.2 kW of power, determine (a) The COP of the heat pump and (b) The rate of heat […]

The variation of pressure within the biosphere affects not only The variation of pressure within the biosphere affects not only living things but also systems such as aircraft and undersea exploration vehicles. In each case, g= 9.81 m/s2 and the pressure at sea level is 1 atm. Is this the question you were looking for? […]