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A closed, frictionless, piston-cylinder assembly contains 4 lbm of H20. Beginning with an initial volume of 10 ft^3, the H2O is compressed slowly until the volume has been reduced to 10 percent of the initial volume. During the process, heat transfer from the H2O occurs at such a rate as to keep the temperature constant at 300 degrees F. determine the magnitude and direction of the work and the heat transfer during the process.
water and steam enter an insulated mixing chamber in steady flow. the liquid water enters at 20 0c and 3 bars with a
An ideal gas, with temperature independent Cp=(7/2)R, at 15c and having an initial volume of 60m^3, is heated at constant pressure (P=0.1013 MPa) to 30c by transfer of heat from a reservoir at 50c. Calculate delS(gas), delS(heat reservoir), delS(univ..
use the generalized virial equation to speculate whether a small leak in an h2 line at 300 bar and 298 k might raise
Calculate the change in free-energy associated with the formation of a critical spherical nucleus in pure liquid nickel that is 200 ºC under cooled. Properties of Nickel: Heat of Fusion 2660 J/cm3; Surface Energy 255x10-7 J/cm2 ; Freezing Temperatur..
a heat engine has a solar collector receiving 0.2 kwm2 inside which a transfer media is heated to 450 k. the collected
The weight W causes a tension of 100lb in cable CD. If d= 2ft, what is the momentum about the z axis due to the force exerted by the cable CD at point C?
the 150-lb man lies against the cushion for which the coefficient of static friction is mu s 0.5. determine the
The bottom of a chair (where you sit, the ‘seat’) will be injection molded by itself in a mold. Assume the chair is a disk, 24 inches in diameter and 1/10 inch thick. If the injection pressure is 1600 psi, what is the minimum clamp tonnage you need f..
an electric power distributor charges residential customers 0.10 per kilowatt-hour kwh. the company advertises that
a water tank consists of a cylindrical part of radius r and height h and a hemispherical top. the tank is to be
we find that 10h are required to successfully carburize a batch of 500 steel gears at 900cwhere the iron has the fcc
You are invited as an engineer to perform a study for a newly built community to cover their power need of 30 MW.
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