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At steady state, a heat pump provides energy by heat transfer at the rate of 25,000 Btu/h to maintain a dwelling at 708F on a day when the outside temperature is 308F. The power input to the heat pump is 4.5 hp. Determine (a) the coefficient of performance of the heat pump. (b) the coefficient of performance of a reversible heat pump operating between hot and cold reservoirs at 708F and 308F, respectively, and the corresponding rate at which energy would be provided by heat transfer to the dwelling for a power input of 4.5 hp.
Calculate the magnitude of the moment acting at the build-in end and specify the orientation of the moment vector relative to the principal centroidal axes of the section with the aid of a sketch and determine the stresses at each corner of the bu..
Find the moment of inertia and natural frequency of a vertical cantilever pipe 12 feet tall with outer diameter of 4.5 inches and an inner diameter of 4.25 inches.
the motion of a particle is defined by the equations and x 2t t2m and yt2m where t is in seconds.a determine the
a car is traveling at a constant speed of 35 mph. what is the normal component of acceleration of the car at the top of
An ideal compressor compresses 12 kg/min of air from 300K and 100 KPA isothermally to a final pressure of 600 KPA. Determine the power and heat transfer in kW.
Motor coming to rest, A motor is running at 12 rpm and the switch is flipped and cuts the power. The rotor weighs 75 lbs.
metals a and b of melting poin 700 and 920 respectively are matually soluble in liguie state but partilally soulable in
as a committed olympic weightlifter you bring alonf a barbell on your campaign trip. each end of the bar carries a mass
Water enters a 2 meter diameter pipe at a temperature of 23 deg C. The water leaves the pipe at a temperature of 97 deg C The laminar flow rate is such that the Reynolds number is 800. What is the mass flow rate?
consider a reheat cycle with steam leaving the boiler and entering the turbine at 4 mpa and 400 c . after expanded in
1. Assume that a parity bit is transmitted for every nibble of data. Design two logic circuits that check a nibble of data and its parity bit to determine if there may have been a data transmission error. Assume first an even-parity system, then a..
A light aircraft with a wing area of 200 ft2 has a lift coefficient of 0.4 and a drag coefficient of 0.05. the power required to maintain level flight is 66hp. determine the weight of the airplane. recall power is force in the direction of velo..
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