Engineering, 24.06.2021 22:50 erikloza12pdidtx
A reversible heat pump delivers heat at a rate of 100 kW to warm a house maintained at 20 oC. The ambient air at -5 oC, serves as the cool reservoir. Please calculate the rate of entropy change of the hot and cool reservoirs, respectively, as well of as the heat pump system. Please also check and justify if this heat pump satisfies the increase of entropy principle.
Answers: 1
Engineering, 04.07.2019 03:10
What precautions should you take to prevent injuries when dealing with heavy loads?
Answers: 1
Engineering, 04.07.2019 18:10
Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.
Answers: 1
Engineering, 04.07.2019 18:10
Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.
Answers: 3
Engineering, 04.07.2019 18:10
Determine whether or not it is possible to compress air adiabatically from k to 140 kpa and 400 k. what is the entropy change during this process?
Answers: 3
A reversible heat pump delivers heat at a rate of 100 kW to warm a house maintained at 20 oC. The am...
Mathematics, 22.08.2019 14:00
Computers and Technology, 22.08.2019 14:00
Mathematics, 22.08.2019 14:00
Mathematics, 22.08.2019 14:00
Chemistry, 22.08.2019 14:00
History, 22.08.2019 14:00
Social Studies, 22.08.2019 14:00
Chemistry, 22.08.2019 14:00
History, 22.08.2019 14:00
Mathematics, 22.08.2019 14:00
Mathematics, 22.08.2019 14:00