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A spring-loaded piston-and-cylinder device is initially filled with 0.2 lbm of a vapor-liquid mixture of R-134a at -30F and a quality of 80%. The spring constant in the spring force relation F = k x is 37 lbf/in, and the piston diameter is 12 in. The R-134a undergoes a process that increases its volume by 40%. Calculate the final temperature and enthalpy of the R-134a.
How much work(J)is done in a natural rubber filament when strains slowly and non reversely to a= 2?
a rigid insulated vessel is divided into two compartments connected by a valve. initially one compartment occupying
an insulated cylinder is initially filled with saturated r-134a vapor at a specified pressure. thenbsprefrigerant
a gas in a cylinder fitted with a piston undergoes a cycle composed of three processes. first the gas expands at
a sealed rigid container of volume .6 m3 contains water in the form of saturated vapor at 550 kpa. energy in the form
two identical 3 in. major-diamter power screws single-threaded with modified square threads are used to raise and lower
a piston cylinder device contains 1 kg of liquid water at 200kpa and 25 deg c. heat is added to the water in the
standard atmospheric air at stagnation conditions t0 59 degree f p0 14.7 psia is drawn steadily through a
gold au forms a substitutional solid with silver ag. compute the weight percent of gold that must be added to silver to
air initially at a dry-bulb temperature of 45oc and relative humidity of 10 is adiabatically humidified to 60 relative
determine the values of Q that minimizes unit sales cost UC = TC/Q; and compute the annual profit earned by the plant at this quantity.
in all but a very few vehicles today crush or crumple zones are employed as a method to reduce energy transfer to the
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