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An insulated piston-cylinder device initially contains 9.647 lb of air at 20 psia and 60ºF. Then 1000 Btu per lb of air of heat is added to the system while the pressure remains constant. Determine the change in entropy of the air using a variable heat capacity in units of Btu/R. Please show your work.
a satellite p is in a circular oribt of radius rho around a fixed mass o. how much energy is required to change to an
a compressor is used to pressurize pure oxygen for respiratory assistance applications. the pure oxygen enters the
a diesel engine performs 2090 j of mechanical work and discards 4125 j of heat each cycle.a how much heat must be
there are supplied to a nozzle 2400 lbhr of steam at an absolute pressure of 200 psia. at the entrance v1 6000 ftmin
consider a combined gas-steam power plant. water for the steam cycle is heated in a well-insulated heat exchanger by
steam expands isentropically from 2 mpa and 500 k to a final state in which the quality is 0.90. determine the final
an air-standard brayton cycle is utilized as a jet propulsion engine. the aircraft flies at an altitude of 5000 m at a
1. a process water with a specific heat capacity of 4.182 k.1 kg-i k-1 flows at a rate of 0.050 kg s-i through a heat
wet steam p12.8 kpa x0.90 enters a heat exchanger with a flow rate of 1.2 kgs. cold water at 12.8 kpa and k also
air initially at a dry-bulb temperature of 45 degrees c and hr 10 is adiabatically humidified to hr 60.a determine
Determine whether laminar-to-turbulent transition occurs in the boundary layer of the fuselage. If transition occurs, where does it occur - Estimate the skin friction drag on the aircraft's fuselage.
the beam ab is subjected to the uniformly distributed load shown and to two unknown forces p and q. knowing that it has
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