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A heat pump used to heat a house runs about one third of the time. The house is losing heat at an average rate of 22,000 kJ/h. If the COP of the heat pump is 2.8, determine the power the heat pump draws when running.
Consider a 210 MW steam power plant that operates on a simple ideal Rankine cycle. Steam enters the turbine at 10 MPa and 500o C and is cooled in the condenser to a pressure of 10 kPa. Show the cycle on a T-s diagram with respect to the saturation li..
the acceleration of a particle as it moves along a straight line is given by a 2t-1ms2 where t is in seconds. if s 1m
A machine of mass 400 kg operates at 1500 rpm and has an unbalanced which causes a harmonic repeated force pf magnitude 20,000 N. Design an isolation system to limit the transmitted force to 3,500 N and the amplitude of vibration during operation to ..
two bars one having a circular section of radius b the other an elliptic section with semiaxes ab.for equal angles of
air is compressed in an insulated system from an initial volume and density of 0.42 m3 and 1.11 kgm3 respectively to a
Calculate the concentration of vacancies in Pb at its melting temperature of 327oC. Assume an energy for vacancy formation of 0.55 eV/atom. Lead has an atomic weight of 207.2 g/mol and a density of 11.35 g/cm3.
a tank with volume 0.100m3 is filled with helium gas. if a balloon is filled with helium until the diameter is 30.0cm
At the beginning of the compression stroke, the volume of a certain diesel engine cylinder is 1.000 liter and it is filled with air at 300 K and 100 kPa absolute. At the end of the compression stroke the air is at 800 K and 4280 kPa absolute.
A heat engine operates between reservoirs at 1000 and 300 K. Some of the power output from the heat engine drives a refrigerator which operates between 250 and 300 K. The heat-transfer input at 1000 K to the heat engine is 1000 kJ, and the heat trans..
the efficiency of counter flow heat exchanger is given byrtco-tcithi-tciwheretcocold water outlet temperaturetcicold
a coin placed 30.8 cm from the center of a rotating horizontal turntable slips when its speed is 51.2 cms.a what force
a rigid vellel with the volume of 10 m3 contains a water-vapor mixture at 400 kpa at 60 percent quality. the pressure
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