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A heat pump is used to heat a house.When the outside air temperaure is 10 F and the inside is maintained at 70 F, the heat loss form the house is 60000 Btu/hr. Determine the minimum electric power (kw) required to operate the heat pump.
a 600 mw coal-fired power plant has an overall thermal efficiency of 38. it is burning coal that has a heating value of
gaseous hydrogen at 10 bars and 27 degrees celsius is stored stored in a 100 mm diameter spherical tank having a steel
the 8 kg sack slides down the smooth ramp. if it has a speed of 1.5ms when y.2m. determine the normal reaction the ramp
assuming a constant concentration gradient and constant number of atoms at the surface calculate the approximate
floor-on ltd. operates a line that produces self-adhesive tiles. this line consists of single machine stations and is
Calculate the heat transfer per kilogram of air between sections (1) and (2), and the stagnation pressure at section (2).
infinite resistor network is shown below composed of resistors of resistance r0 on the horizontal lines and 2r0 on the
a certain object weighs 300 n at the earths surface. determine the mass of the object in kilograms and its weight in
A steady flow air compressor compresses 50 lb/min from 14 psia and 80 degrees F to a discharge state at 45 psia and 300 degrees F. Heat departs from the air only via circulating water that enters the jacket at 75 degrees F and leaves at 95 degrees..
water with a pressure of 800 kpa and a quality of 0.334 undergoes a constant pressure expansion process to four times
descriptive questions - give brief answers in words. no calculations are required. you may write your answers in point
find the isentropic and the second law efficiencies for a turbine. it receives steam at 3000 kpa 500c and has two exit
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