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Air is compressed in a piston-cylinder device from 90 kPa and 20 degrees C to 400 kPa in a reversible isothermal process. Determine (a) the entropy change of air and (b) the work done.
a cyclic steam power plant is to be designed for a steam temperature at turbine inlet of 360 celsius and an exhaust
one of your classmates claims to have invented a flow device to increase the superheat of steam. his claim is that he
4 kgs of saturated liquid water is heated in a steam boiler at 2 mpa to an outlet temperature of 250 c. determine the
1 a barrel is rolled up an incline 20 ft along its length and 6 ft in vertical height by means of a rope that is
block c starts from rest at t 0 and moves downward with a constant accelerration of 4 ins2 . knowing that block b has
1. for each of the two proposed replacement presses determinenbspa. initial investment.nbspb. operating cash inflows.
heat is transferred steadily to boiling water in a pan through its flat bottom at a rate of 650 w. if the temperature
A vapor-compression heat pump system uses R-134a as the working fluid. The refrigerant enters the compressor at 0.24 Mpa, 0 degrees Celsius, with a volumetric flow rate of 0.6m^3/min. The compression process is adiabatic to 0.9 MPa, 60 degrees Cel..
What is the acceleration of the truck if the coupling at C suddenly fails? The car wheels are free to roll. Neglect the mass of the wheels.
determine the density specific heat and thermal conductivity of a lightweight aggregate concrete mix that is composed
What are the percentages of the total heat absorption taking place in the economizer, boiler drum and the superheater, respectively? Assume cp of air and water as 1.005 kJ/kg K and 4.2 kJ/kg K, respectively.
a rigid tank a of volume 0.6 m3 contains 3 kg water at 120 degrees celsius and the rigid tank b is 0.4 m3 with water at
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