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A heat pump operates on the ideal vapor compression refrigeration cycle with R-134a as the working fluid between the pressure limits of 0.32 MPa and 1.4 MPa. If the mass flow rate of the refrigerant is 0.25 kg/s,Find the rate of heat supply by the heat pump to the heated space.
argon at 2mpa and 500oc enters an isentropic turbine. the temperature of argon at the outlet is 20oc. determine the
air at a stagnation pressure of 450 kpa and stagnation temp of 400k flows through a converging nozzle whose throat area
superheated steam at 120 bar and 520c leaves the steam generator of a vapor power plant and enters a turbine with an
A refrigerating plant operating between temprature limit of 253k and 307k provides 4.5kJ/s of refrigerating effect. If the refrigerating efficiency of the plant is 0.76. calculate the power required to drive the plant.
wind is blowing on a 55-gallon drum. estimate the wind speed needed to tip the drum over. work in si units. the mass of
A 9º wedge is inserted using a force of 1000 lbs. The static coefficient of friction between the wedge and the log is 0.50. Determine the force required to pull the wedge out.
an ideal vapor-compression refrigeration cycle that uses refrigerant-134a as its working fluid maintains a condenser at
one pound-mass of air at 10 psia 70 of is contained in a piston-cylinder device. the air is now reversibly compressed
the 1.3-lb collar slides with negligible friction on the fixed rod in the vertical plane. if the collar starts from
a concrete wall which has a surface area of 20 m2 and is 0.30 m thick separates conditioned room air from ambient air.
a power washer used to clean the sidingof a hosue has water entering through a hose at 20c 1atm and avelocity of 0.2ms.
a particle of mass m kg carrying q coulombs enters the space between two charged plates with the horizontal velocity
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