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Ten pounds-mass of R-22 is at an initial volume of 4.059 ft3 and pressure of 200 psia. It is compressed isobaric ally until its volume is two-thirds of its initial volume. The piston is then held in place as the refrigerant cools until its temperature is 70 F. Determine the heat transfer [Btu] and work transfer [Btu] for the two-step process. Also show the process on P-v state diagram.
Given the melting point of steel to be approximately 1500C, how much energy is required to melt a cubic inch from room temperature? How much water would this amount of energy raise by 10oC from room temperature?
a thermal power station operates on the following cycle . water is pumped into a boiler where it is converted to high
for an iron-carbon alloy of eutectoid composition 0.76 wt carbon what is the required time at 675 degrees celsious to
air enters and air compressor at a steady volume flow rate of 45 m3min. the air pressure increases from 100 to 700 kpa
a plate 50 mm wide and 15 mm thick is loaded in tension. the plate is made from steel with yield strength of 1500 mpa
refrigerant 134a enters an adiabatic compressor as saturated vapor at 120 kpa at a rate of 0.3 m3min and exits at 1 mpa
a quantity of air undergoes a thermodynamic cycle consisting of three internally reversible processes in series process
A person with no experience in fluid mechanics wants to estimate the friction factor for a 1 in diameter galvanized iron pipe at a Reynolds number of 8000. The person finds the equation f = 64/Re. Explain the problem with this approach and estimate t..
a thin-walled closed-end cylindrical pressure vessel with spherical end caps is internally pressurized to 500 psi. if
What can you say about minimum effective radius of insulation? A node is located at the external corner with one side exposed to convection, and the other side insulated. if implicent method is use to dicaribe this node, what is the correct stability..
a solid cylindrical workpiece made of 5052-o aluminum is 12 cm high and 8 cm in diameter. assuming there is no
measurement of the electrical resistivity of gold wires have indicated that the equilibrium vacancy concentration
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