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A refrigerator with a COP of 3 removes 1.5 kW from the cold space at -9 °C while rejecting heat to the kitchen at 22 °C. (a) Draw and label a schematic of the system. (b) Find the exergy (kJ) for each form of energy entering and leaving the refrigerator. (c) Find the reversible work (kJ). (d) Find the second law efficiency (%) of the refrigerator.
calculate the position of the quasi-Fermi levels for electrons and holes with respect to the intrinsic level (assume that ni=1.5x10^10cm^-3).
Important information about Pressure Cooker, Steam is leaving a pressure cooker whose operating pressure is 30 psi. It is observed that the amount of liquid in the cooker has decreased by 0.4 gal in 45 minutes after the steady operating conditions..
In the idealized model attached shown, m = 15 kg, k = 135 N/m, and the viscous damping ratio is 0.15. Assume that an external harmonic force F(t) = 15 cos 4 t acts on the system with F0=15 N and forcing frequency of 4 rad/s.
Calculate the magnitude of the moment about the base point O of the 600 N force and calculate and draw the shear force and bending moment diagram for the cantilever beam
Midrange and amplitude components, A shaft is subjected to a completely reversed bending stress such that Xmax=40kpsi and Xmin=-40kpsi
what is the specific volume, internal energy (kj/kg) and enthalpy (kj/kg) for water at 1.8 mpa and 120 Degrees C? Locate the state on p-v diagram and document assumptions.
Focus mainly of consumer items such as iPods, coke bottles, running shoes
Determine the Final Velocity, An object whose mass is 1 lb has a velocity of 100 ft/s. How would I determine the final velocity, in ft/s, if the kinetic energy of the object decreases
calculate the largest semicircular surface flaw oriented along the axis of the bores that could withstand a fluid pressure of 50MPa.
Equation of an elastic curve, Given the equation of the elastic curve for a simply supported beam, how would you obtain the slope in the beam, since the equations are related?
Fluid Statics: Submerged Submarine, A submarine is at a depth of 2000 ft from the water surface. The atmospheric pressure above the water is at 14.7 psia
Hydrostatic relation, An empirical formula relating pressure and density for seawater w/ temperature held constant is
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