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A layer of ice is placed on a flat hot surface with a constant temperature of 70 °C. The initial layer thickness is 10 cm. The ice temperature and the outside air temperature are equal to 0 °C. Assuming that water formed during the ice melting remains between the ice and the hot plate, evaluate the time required for complete melting of the ice layer
a cylinder of cross-sectional area a is divided inot tow chambers 1 and 2 by means of a frictionless piston. the piston
in a diesel cycle the cutoff ratio is two and the compression ratio is eighteen. at state 1 the air is 14.7 psia and
water at 20 mpa and 60 degrees celcius enters a mixing chamber at a rate of 280lbmmin where it is mixed steadily with
at steady state a heat pump maintains the interior of a house at 77f by transferring to it 30 kw of heat from the
at 100 lbfin2 saturated vapor h2o flows in a pipe. a valve is opened to vent a small amount to the atmosphere. assuming
in a carnot cycle heat is supplied at 350 and rejected at 27 . the working fluid is water which while receiving heat
it takes 0.5 seconds for one to lift the cart handle from 0 to 450 in a linear way around o. if the block has a mass of
How is the technology utilized effectively or ineffectively? What are some barriers to more effective usage, and what are some recommendations you would make to overcome these barriers?
a 2.5 hp motor is used to move an 200lbf object across a horizontal surface at a velocity of 22 fts in a time period of
the boss asked you to size a dehumidifier to dehumidify 100lbm per hr of air. the desiggn calls for air entering the
a cycle consists of two isochoric and two isothermal process. the volume variation vmax vmin in the cycle is r fold
in a gas turbine natural gas methane and stoichiometric air flow into the combustion chamber at 1000kpa 500k. secondary
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