Engineering, 05.10.2019 11:30 zafarm2oxgpmx
Apiston—cylinder device contains 6.95 kg of refrigerant-134a at 0.6 mpa and 700c. the refrigerant is now cooled at constant pressure until it exists as a liquid at 220c. if the surroundings are at 100 kpa and 250c, determine (a) the exergy of the refrigerant at the initial and the final states and (b) the exergy destroyed during this process.
Answers: 3
Engineering, 03.07.2019 15:10
Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?
Answers: 3
Engineering, 04.07.2019 18:10
Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.
Answers: 3
Engineering, 04.07.2019 18:10
Which one from below is not one of the reasons of planning failures? (clo3) a)-planner is careless. b-planner spend less time in the field but more time on the desk c)-planner is not qualified d)-planner does not have sufficient time to properly plan
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Engineering, 04.07.2019 18:20
How much power could a wind turbine produce if it had the following specifications? cp = 0.45 -d=1.2kg/m3 d=50m v 5m/s
Answers: 2
Apiston—cylinder device contains 6.95 kg of refrigerant-134a at 0.6 mpa and 700c. the refrigerant is...
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