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Consider a refrigerator that accepts 15 kW of heat in the evaporator and rejects 19.76 kW of heat from the condenser. The compressor requires an input of 5 kW of power and loses 0.24 kW of heat. Determine the coefficient of performance for this refrigerator.
a projectile is launched at a with a spped u and 45 degree launch angle. if the peak of the trajectiry is at 8 km from
a rigid well insulated container with a volume of 2 ft3 holds 0.12 lb of ammonia initially at a pressure of 20 lbfin2.
a cylindrical metal specimen having an original diameter of 11.05 mm and gauge length of 51.7 mm is pulled in tension
milk is pasteurized if it is heated to 63c for 30 min but if it is heated to 74c it only needs 15 seconds for the same
a fan drawing electricity at a rate of 1.5 kw is located within a well insulated 60 cubic meter rigid enclosure filled
a rigid tank contains 5 kg of refrigerant-134a initially at 20degc and 140 kpa. the refrigerant is now cooled while
one kilogram butane c4h10 of is burned with 25 kg of air which is at 35 degree celcius and 100 kpa. assuming the
a 12-in. length of aluminum tubing with properties of e 10.4 times 106 psi and alpha 12 times 10 -6 per degree
an 18-m long steel wire of 5mm diameter is to be used in the manufacture of a presstressed concrete beam.it is observed
an airplane is flying at v0130 mph and with a constant time rate of increase of speed v22fts2 when it starts to climb
a hydrogen gas in a pistoncylinder assembly at 280k 100 kpa with a volume of 0.1 m3 is now compressed to a volume of
a 10m height chimney has a 2.0m x 2.0m square cross section. the wind blows horizontally in a direction which is
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