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Refrigerant-134a enters the condenser of a residential heat pump at 900 kPa and 40°C at a rate of 0.02 kg/s and leaves at 900 kPa as a saturated liquid. If the compressor consumes 1.2kW of power, determine (a) the COP of the heat pump and (b) the rate of heat absorption from the outside air
It is desired to purchase a steel tank to store 20,000 US gallons of liquid propane; design pressure is 250 psig, and design stress is 20,000 psi. For steel, SG = 7.9. What will be the weight of metal in the shell (excluding foundation, valves, manho..
a 5-ton elevator is supported by a standard steel cable of 25 in2 cross section and an effective modulus of elasticity
the landsat-c earth resources satellite has a nearly circular orbit with annbspeccentricity of 0.00132. at perigee the
a steel wide flange beam w14 x 26 carries the load. compute the maximum deflection between the supports and at each
jet-type pumps are sometimes used for special purposes such as to circulate the flow in basins in which fish are being
A direct injection, four-stroke, six cylinder Diesel engine has 10L if displacement volume. Bore and stroke dimensions are 125mm and 136mm, respectively. The engine was designed to deliver 184 HP at 2100 RPM. Calculate the air flow rate (g/s) when pi..
a household refrigerator with a cop of 1.8 removes heat from the refrigerator space at a rate of 90 kjmin. determine
how much heat is needed to a 0.3m3 rigid volume containing saturated water vapor at 1000 kpa in order for final
an insulated cylinder is initially divided into halves by a frictionless thermally conducting piston. on one side of
Calculate the change in velocity required in changing the position of a satellite in an orbit by 90 degrees. The initial and final orbit is circular around the Earth with a 15000 km radius. Calculate the delta velocity, semi-major axis and period for..
Wet stream (Saturated liquid-vapor mixture) at 2.00 Mpa is the initial state of a constant enthalpy process. The end state is at 0.100 Mpa, 150?. Determine the quality of the wet stream (i.e. the initial state)
1. would a flagpole made of steel or aluminum freeze ones tongue to it faster? why? thermal conductivity2. the outer
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