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An isolated system consists of a closed copper vessel of mass 0.1 kg, containing 1 kg of liquid water, each initially at 5°C, immersed in 20 kg of liquid water, initially at 20°C. The system is allowed to come to equilibrium. Determine the final temperature in °C, the entropy change for the copper vessel and each of the liquid water masses, and the amount of entropy produced
a counter flow heat exchanger is used to cool air at 540 k and 400 kpa to 360 k using a 0.05 kgs supply of water at 20
Explain why metals are ductile and ceramics are brittle, in terms of their dislocation motion. Draw 2 pictures to sequentially show an edge dislocation gliding through a crystal, using dots to represent the atoms. Draw 2 pictures to show how a disloc..
the question is during the compression of 0.6 kg of gas in a cylinder an amount of work equal to 80 kj is supplied to
Refrigerant-134a is throttled from saturated liquid state at 7 bar to a pressure of 1.4 bar. Determine the temperature drop during this process and the final specific volume.
materials are deep-seated in human culture. do you agree with this statement? why or why not? give examples of
two concentric helical compression springs made of steel and having the same length when loaded and when unloaded are
the 150-lb fireman is holding a hose which has a nozzle diameter of 1 in and hose diameter of 2 in. if the velocity of
helium is throttled from 1.2 mpa 20degc to a pressure of 100 kpa. the diameter of the exit pipe is so much larger than
a household freezer operates in a room at 20ordmc. heat must be transferred from the cold space at a rate of 2 kw to
a 20deg steel spur pinion with 25 teeth and module 1.5 mm transmits 150 w to a 49 tooth cast iron gear. pinion speed is
the blade assembly of an oscillating fan rotates with a constant angular velocity w1 -360rpm i with respect to the
Liquid water in a pumped flow system experiences varying pressures as it circulates through the system. One concern in designing any such system is to ensure that cavitation does not occur. If the water temperature during operation of a particular sy..
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