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Air contained in a piston-cylinder assembly contains air, initially at 2 bar, 300 K and a volume of 2 m^3. The air undergoes a process to a state where pressure is 1 bar, during which the pressure-volume relationship is PV=constant. Assuming ideal gas behavior for air, determine the mass of the air, in kg and the work and heat transfer, each in KJ.
design a container using differentiation that has a volume of 2500 litres. it must use the minimum amount of material.
Refrigerant 134a leaves the evaporator as saturated vapor at 1.4bar and is heated at constant pressure to 20 degrees C before entering the compressor.
a long solenoid has a diameter of 12.0 cm. when a current i exists in its windings a uniform magnetic field b 27.0 mt
a vertical hydraulic cylinder has a 125-mm diameter piston with hydraulic fluid inside the cylinder and an ambient
During the process, the pressure and specific volume are related by pv = constant. For the refrigerant, determine the work and heat transfer per unit mass, each in KJ/kg.
A reversible heat engine operates between 875 K and 310 K and drives a reversible refrigerator operating between 310 K and 225 K. the engine receives 2000 kJ of heat and the net work output from the arrangement equals 350 kJ. make calculations for..
a 4-in. diameter disk shown weigts 20 lb. the disk is released at rest when theta30 degrees and rolls down the curved
The heat transfer coefficient in the oven is 25W/m^2K. Calculate rate of heat transfer per m^2 area.
determine the maximum allowable uniform load w that can be supported by the fiberglass beam if b 125 mm and the
a hot gold brick with a volume 0.01m3 and initially at a temperature 95oc is dropped into an enclosed kiddle pool of
the homogeneous gate shown in fig. p2.88 consists of one quarter of a circular cylinder and is used to maintain a water
consider an ideal gas-turbine cycle with two stages of compression and two stages of expansion. the pressure ratio
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