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Consider air in a piston-cylinder assembly. Initially, the air is at P1 = 2bars and T1 = 600K . The air is compressed isothermally in quasi-equilibrium to P2 = 4bars without friction between the piston and cylinder.
What is the external force in N for this particular process at state 1, state 2 and an intermediate state at P1 = 1.5bars ? The piston area is 0.05 m^2.
What is the heat transfer in kJ if there is no change in the system's internal energy. Neglect changes in KE and PE.
consider the heating of an incompressible fluid with velocity um inside a thin - walled tube. the diameter of the tube
what does it mean when a steel cable is required to have a factor of safety of at least 5 against its ultimate load?
a small vapor-compression refrigeration unit is to be built into a recreational vehicle and is designed to operate on a
which of these two processes will produce the largest amount of work? (You must provide a full explanation for your choice).
air at t11300 0r p116 lbfin2 enters a counterflow heat exchanger operating at steady state and exits at p214.7 lbfin2.
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.
What is the primary difference between the strength of a structure and the strength of a material? Is a strong material stiff?
a mixing chamber receives 3kgmin ammonia as saturated liquid at -20 c from one line and ammonia at 40 c 300 kpa from
consider a l0-plate fuel cell stack at an anode stoichiometry of 1.2 with 20 a current generated in the stack and a
a 15-tooth pinion having a pressure angle of 25ordm and module of 8mm is to drive an 18-tooth gear. determine for both
calculate the total dv required to transfer between two coplanar circular earth orbits of radii r1 2 du and r2 5 du
air at 1 bar and 20 degrees c is compressed isentropically to 20 bar pressure. for both a and b assume that air is an
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