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A piston-cylinder assembly contains a two-phase liquid-vapor mixture of ammonia initially at 500 kPa with a quality of 98%. Expansion occurs to a state where the pressure is 150 kPa. During the process the pressure and specific volume are related by pv=constant. For the ammonia, determine the work and heat transfer per unit mass, each in kJ/kg.
a closed system of mass 6lbm undergoes a process in which there is a heat transfer of 245 ft-lbf from the system to
a preheater involves the use of condensing steam at 100c on the inside ofnbspa bank of tubes to heat air that enters at
air flows through a converging adiabatic duct with no loss. the temperature at the inlet is 400 k. at the outlet the
a vehicle has an inline 6 engine with a total displacement of 2979 cm3 and a compression ratio of 10.2. from the
a high school project involves building a model ultralight airplane. some of the stu- dents propose making an airfoil
an ice skating rink is located in a building where the air is tair 20c and the walls are at tw 25c. the convection
write a function that accepts an array a as input and searches the contents of the array for elements in three
During a lab demonstration, two thermocouples were made by using copper-constantan wires. The junction diameter of one thermocouple is 1 mm, while the other is 0.2 mm. Initially, both thermocouples were held in a constant-temperature environment and ..
a rectangular vacuum cleaner attachment is 2.5 cm by 12 cm. the vacuum blower is able to provide suction at 0.012 m3s.
consider a 12-cm-thick plane wall with its inner surface temperature fixed at 0 degrees celsius. when its outer surface
The rigid L-shaped member ABC is supported by a ball and socket at A and by three cables. Determine the tension in each cable and the reaction at A caused by the 242 kg load applied at G.
the beam ab is pin supported at a and supported by a cable BC. determine the resultant internal loadings acting on the cross section at points d and e.
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