Engineering, 06.03.2020 22:45 destinymccray35
Refrigerant-134a at 320 kPa and 40°C undergoes an isothermal process in a closed system until its quality is 35 percent. On a per-unit-mass basis, determine how much work and heat transfer are required. Use the tables for R-134a.
Answers: 1
Engineering, 06.07.2019 02:30
Define thermoplastic polymers and thermosetting polymers in terms of their structures, and (ii) describe briefly a process suitable for the production of products from each type of polymer.
Answers: 3
Engineering, 06.07.2019 05:10
Comment on the effect of lubrication of the punch surfaces on the limiting drawing ratio in deep drawing.
Answers: 3
Engineering, 06.07.2019 05:10
Air undergoes a constant pressure cooling process with no moisture added or removed. the air originally exists at 45 °c, 150 kpa and 35 % relative humidity. it is cooled until the temperature reaches 29 oc. determine (a) the relative humidity of the cooled air. (b) the dew point temperature of the cooled air in °c. (c) the heat removed during the cooling process in kj/kg. use the psychrometric chart to check your answers (this part will not be graded; however, it will you get comfortable using the psychrometric chart)
Answers: 3
Engineering, 06.07.2019 05:20
Amass of 3 kg of saturated liquid-vapor mixture of water is contained in a piston-cylinder device at 150 kpa. initially, 1 kg of the water is in the liquid phase and the rest is in the vapor phase. heat is now transferred to the water, and the piston, which is resting on a set of stops, starts moving when the pressure inside reaches 500 kpa. heat transfer continues until the total volume increases by 20 percent. determine (a)-the initial and final temperatures, (b)-the mass of liquid water when the piston first starts moving, and (c)-the work done during this process. d)-show the process on a p-v diagram. you don't need to indicate p& v values, but clearly indicate where all states are located in the phase diagram.
Answers: 3
Refrigerant-134a at 320 kPa and 40°C undergoes an isothermal process in a closed system until its qu...
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