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A food department is kept at -15 degrees Celsius by a refrigerator in an environment at 25 degrees Celsius. The total heat gain to the food department is estimated to be 3500 kJ/h and the heat rejection in the condenser is 4500 kJ/h. Determine the power input to the compressor, in kW and COP of the refrigerator.
what is the pressure at the bottom of a 300 ft tall dam psi? and what is the flowrate of a river that must flow through
a removable bracket must be attached to the frame of a machine tool as a support. the need for interchangeability
for a 3 sigma control chart what is the probability of four successive points plotting outside 2 sigma limits? if such
a piston-cylinder assembly with a free piston contains 0.45 m3 of propane vapor and 0.05 m3 of liquid propane as a
a heat engine accepts 200000 btu of heat from a source at 1500 r and rejects 100000 btu of heat to a sink at 600 r.
as part of a pollution study a model concentration c as a function of position x has been developedcx ae-x2a -
saturated vapor steam at 5 psia eneters an adiabatic heat exchanger and leaves as saturated liquid at 5 psia. the steam
a projectile is launched from point a with initial speed v0 and makes an angle ?n with the horizontal. it hits the
Convert the composition of the following alloy from atom percent to weight percent (a) 44.8 at% of silver, (b) 46.3 at% of gold, and (c) 8.9 at% of Cu. Assume that the atomic weights for silver, gold and copper are, respectively, 107.87, 196.97 an..
Determine the angle theta degrees that requires the minimum torque T to keep the seam closed. (Hint: use Mohr's circle). Give the answer in degrees.
a large fireplace in a ski lodge has a glass firescreen which covers a vertical opening in the fireplace. the opening
Under what conditions would the use of carburetor heat be detrimental?
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