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A heat pump is used to maintain a house at 22 C by extracting hear from the outside air on a day when the outside air temperature is 2 C. The house is estimated to lose heat at a rate of 110,000 kJ/h, and the hear pump consumes 5kW of electric power when running. Is this heat pump powerful enough to do the job?
an inventor claims to have devised a refrigeration cycle that at steady state requires a net power of .8 hp to remove
a steel bolt is placed through an aluminum tube. sturdy washers are placed on each end of the tube and the bolt is
what are the properties of petrol that it make particularly suitable for the use as fuel in a motor vehicle.
Determine metal removal rate, etching time, and required dimensions of the opening in the cut and peel maskant required to achieve the desired pocket size on the part.
1. graphically verify moseleys law for the k beta1 lines of cu mo and w.2. acalculate the mass an linear absorption
some unknown volume of oil sg 0.918 has been dumped into a vat of sea water sg 1.028 forming a stratified layered
a manufacturer found hat the sales figure for a certain item depended on the selling price. the market research
energy addition in polytropic process in this case the initial air pressure is 750 psia and 750 f. the polytropic
lead experiences corrosion in an acid solution according to the following reaction pb 2h rightarrow pb2 h2 the rates
2.5 kg of h2o is contained in a piston-cylinder assembly initially at a pressure of 1.5 bar and a volume of 1.5m3. the
air at a rate of 10 lbms enters an adiabatic compressor at 15 psia 80 f and leaves at 150 psia 740 f. calculate the
1. imagine a thin cylinder of initial internal diameter do initial wall thickness to and initial fixed length
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