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You are to select a refrigerator for frozen food processing facility. The freezing of the food requires a heat rate of 250kw at a temperature of -20C. you will reject heat to the atmosphere whose temperature is 300K1. What is the upper limit on the coefficient of performance of this refrigerator?2. The minimum rate at which you must reject heat from the refrigerator?3. What is the minimum amount of power that must be supplied to this refrigerator?4. What is the rate at which the entropy of the food changes?5. What is the minimum rate at which the entropy of the atmosphere changes?
A uniform linear charge density of 4 nC/m is distributed along the entire x axis. Consider a spherical (radius = 5 cm) surface centered on the origin. Determine the electric flux through this surface.
an adiabatic turbine expands steam from 500 c and 4000 kpa to 200 c and 300 kpa. the tubrine geneateds 750 kw of power.
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readeachquestioncarefully.remembertoexplainyoursolutionasyougosincedesignproblemscanbesolvedinanumberofways.itisacceptab
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an insulated tank is divided into two parts by a partition. one part of the tank contains 2.5 kg of compressed liquid
a non-uniform steady incompressible flow is observed to have a velocity of 15ms at a point where the cross-sectional
a heat pump heats a house in the winter and then reverses to cool it in the summer. the interior temperature should be
design a computer programme using freudestein equation to synthesise a four bar linkage using three precision points also using more than three points.
1. what are the four fundamental quantities of fluids in aerodynamics?2. what are common units used both english usgs
determine the electrical power input to the pump. the density of water is 1kg/l.
many commercial sinks and publicly-accessible showers have mixing valves underneath them which pre-mix the hot and cold
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