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2 kg of helium gas is initially contained in a rigid tank at 100 KPa and 27 C. The paddle wheel is now turned be an external electric motor until 500 KJ of work has been transferred into helium. During this process, heat is also transferred to helium, raising its temperature to 327 C. a.) Determine the boundary work per unit mass during the process (KJ) b.) Calculate the pressure of helium at the final state (KPa) c.) Calculate the amount of heat transfer during the process (KJ).
An ideal vapor-compression refrigeration system operates at steady state with Refrigerant 134a as the working fluid. Superheated vapor enters the compressor at 30 lbf/in2, 20F, and saturated liquid leaves the condenser at 140 lbf/in2. The refriger..
at a depth of 18360ft fillers on the deepwater horizon encountered fluid at a reservoir pressure of 8900 psia. in order
a rigid tank with volume 0.25 m3 contains 0.5 kg of water at 100 c. a 3 kw heater is energized. calculate the time
heat is generated uniformly inside a 20-mm thick plane wall at a rate of 20000 wm3. the thermal conductivity of the
five kg of r-22 refrigerant at 3 bar and saturated vapor is contained in a closed rigid tank. a process cools the r-22
a 1000 mw power plant 0.375 efficiency uses a central appalachian coal 6.5 wt ash content. estimate the annual amount
Find the corresponding damping coefficient c. Identify the system parameters such as the natural frequency and damped frequency. Derive the mathematical expression of the displacement as a function of time with the given initial condition. Plot yo..
determine the headwater depth of a 1000 mm high by 1500mm wide concrete box culvert operating under outlet control
a baloon rises with a constant velocity.a load is tied by a rope to the basket. when the baloon is at altitude h0 the
five lbm of water 60 degree f is contained in a vertical cylinder by a frictionless piston of a mass such that the
The number-average molecular weight of a polypropylene is 1100000 g/mol. Compute the degree of polymerization.
a sand core used to form the internal surfaces of a steel casting experiences a buoyancy force of 23 kg. the volume of
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