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A heat pump receives heat from a lake that has an average winter time temperature of 6°C and supplies heat into a house having an average temperature of 27°C.
(a) If the house loses heat to the atmosphere at the rate of 64,000 kJ/h, determine the minimum power supplied to the heat pump, in kW.
consider a pefc operating with the following specifications 80 and the pressure is 2 atm at the anode and 20 and the
a cantilever beam member made from steel with hollow circular cross section experiences an axial load of 300 kn f1 and
Water vapor at 100 lbf/in^2, 500 degrees F and a velocity of 100 ft/s enters a nozzle operating at steady state and expands adiabatically to the exit, where the pressure is 40 lbf/in^2. If the isentropic nozzle efficiency is 95%, determine for the no..
A rocket has an empty weight of 500 lb and carries 300 lb of fuel. If the fuel is burned at the rate of 1.5 lb>s and ejected with a velocity of 4400 ft>s relative to the rocket, determine the maximum speed attained by the rocket starting from rest..
A turbojet aircraft flies with a velocity of 900 km/h at an altitude where the air temperature and pressure are -35 degrees C and 40 kPa. Air leaves the diffuser at 50kPa with a velocity of 15 m/s, and combustion gases enter the turbine at 450 kPa an..
What is a double-reduction spur gear train and how would be useful in a commercial food waste grinder in which the final shaft rotates at between 40 and 44 rpm is to be designed. The input is from an electric motor running at 850 rpm and delivering 0..
A cantilever 5 m long carries a uniformly distributed vertical load 480 N per metre from C from H, and a concentrated vertical load of 1000 N at its midlength, D. Construct the shearing force and bending moment diagrams.
concentration is a process by which both useful heat and energy are produced. here a portion of high -pressure steam is
Coal is discharged from the tailgate of a dump truck with an initial velocity vA = 2 m/s A 50°. Determine the radius of curvature of the trajectory described by the coal.
a 1 m3 tank initially contains air at 300 kpa 300 k. air slowly escapes from the tank until the pressure drops to 100
a bead a weighting 2lb slides on a quarter-circular frictionless bar bc with radius. the bead is supported by a cable
Find the temperature at the interface between the rod and sleeve and on the outer surface. What is the temperature at the center of the rod
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