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Refrigerant 134a expands in a piston-cylinder assembly from 180 lbf/in.2 and 140°F to 30 lbf/in.2 The mass of refrigerant is 0.5 lb. During the process, heat transfer to the refrigerant from its surroundings is 1.2 Btu while the work done by the refrigerant is 4.32 Btu. Determine the final temperature of the refrigerant, in °F. Kinetic and potential energy effects are negligible.
Systems Integration at London Heathrow Terminal 5' the authors identify six processes required to execute a megaproject. They note that in each megaproject there is discontinuity between the processes required to deliver the project and those invo..
Knowing that the modulus of elasticity of brass is 105 GPa, determine the magnitude of the load P for which the deflection of the plug is 1,25 mm downward.
a wheel can be modeled as a thin ring having mass 10 kg and four spokes made of slender rods each of mass 2 kg. the
a solid hollow tube thin wall with pin in the bottom and the top part is connect with another tube and there is a force
an 8-kg iron casting at 550 degc is quenched in a tank containing 0.03 m3 of liquid water initially at a temperature of
Determine the time it will take for the ?ow to reach 99% of the ?nal steady-state velocity if the valve is initially closed and then suddenly opened at t ¼ 0. Assume incompressible water and inelastic piping. Let f ¼ 0.030 and K ¼ 0.2 once the valv..
consider a piston-cylinder assembly containing 0.14 kg of air initially at a pressure of 350 kpa. heat is added during
a thin wall tube is subjected to combined tensile and torsional loading. find the relationship between the axial stress
a tornado rips off a 100 m2 roof with a mass of 1000 kg. what is the minimum vacuum pressure needed to do that if we
air enters and air compressor at a steady volume flow rate of 45 m3min. the air pressure increases from 100 to 700 kpa
a for pt at 20 c calculate how many unit cells there are per cubic meter.bhow many total interstitial sites are there
hydrogen h2 at 77 c 4bar enters an insulated chamber at steady state where it mixes with nitrogen n2 entering as a
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