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Air is expanded from 315 psia and 650 F to 96 psia and 40 F. Assuming constant specific heats at room temp, determine the change in the specific entropy of air.
a stream of gaseous propane is burned with air in an adiabatic and zero-work steady flow process. the reactants enter
a refrigerator operates with a coefficient of performance of 4.2 and requires an electrical input of 700 w. if the
Air modeled as an ideal gas enters a combustion chamber at 20 lbf/in^2 and 70F through a rectangular duct, 5 ft by 4 ft. If the mass flow rate of the air is 830,000 lb/h, determine the velocity, in ft/s.
six chemical species are present in significant amounts in a light-ends petroleum fractionation system methane ethane
the base surface of a cubical furnace 3-m x 3-m x 3-m is surrounded by black surfaces at a 1200 k. specified
Air at the rate of 18 kg/s is drawn into the compressor of a jet engine at 55 kPa and -23oC and is compressed reversibly and adiabatically to 276 kPa. Determine the required power input to the compressor expressed in horsepower.
an amusement ride consists of a large horizontal circular platform turning at 12 rpm. people attempt to sit on this
A 0.453-Kg mass attached to a light spring elongates it by 7.87mm. Determine the natural frequency of the system.
100 kmol/h of biogas (75 mol% CH4 and 25 mol% CO2) is produced in a digester and is drawn off from the headspace under a slight vacuum and piped to a natural gas burning boiler. A slight leak develops in the pipe allowing air (79 mol% N2 and 21 mol% ..
10.0 kgm of air is contained in a cylinder by a free-floating frictionless piston. initially the air is at 27 c and
descriptive questions - give brief answers in words. no calculations are required. you may write your answers in point
a simple wheatstone bridge as shown in fig. 7.10 is used to determine accurately the value of an unknown resistance r1
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