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Consider two ideal gases, A and B that are initially separated. For each of the following processes, the gases are allowed to mix. Determine if the entropy change of the system is positive, negative, or zero. Explain. (a) The process occurs isothermally, at constant P. (b) The process occurs adiabatically, at constant P. (c) The process occurs isothermally, at constant V. (d) The process occurs adiabatically, at constant V.
a carnot heat engine operates between a heat source at 1200 k and the environment at 300 k. the net work produced by
a cold water pipe temperature is inside a room of 75 f if the cold water temperature in the pipe is 50 f. what is the
water at 24 degree c flows at 0.8 ms in a smooth 1.5 cm i.d. tube that is kept at 27 degree c. the system is extremely
a campaign sign weighing 68 pounds is suspended from the middle of a cable stretched across a street between two
assuming that the solid shaft has been replaced by a hollow shaft of the same cross-sectional area and with an inner diameter equal to half of its own outer diameter.
14 kgs of liquid water enters a pump at a velocity of 1 ms and at 1 atm pressure. it leaves the pump at a velocity of
a 32.2 lb object is dropped from a 100 feet building. determine the velocity and the kinetic energy at the 50 feet
a 20 mw radial flow hydraulic turbine is to be designed with a head of 70 m and a speed of 90 rpm. a geometrically
an elevated open stairway is designed to be supported by four steel rods connecting the stairway to the ceiling. the
a fluid flows in a pipe with a sudden increase in its cross section as shown in the sketch. assume that the pressure in
a construction tower crane lifts a 10 ton bundle of steel beams 100 feet in the air in 30 seconds. a how much work does
if the exit velocity needs to be 27 ms and the nozzle tip has a diameter of 0.48 mm what is the volumetric flow rate
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