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A well-insulated rigid tank contains 8 kg of a saturated liquid-vapor mixture of water at 100 kPa. Initially, three quarters of the mass is in the liquid phase. An electric resistance placed in the tank is now turned on and kept on until all the liquid in the tank is vaporized. Determine the entropy change of the steam during this process.
a rigid tank initially evacuated develops a small hole and air slowly leaks in from the surroundings at a mass flow
The kite cable makes an angle of 25 degrees with the horizontal. The velocity of the wind is 30 miles/hour. Neglect ship wave drag.
Calcium oxide (CaO) is formed by decomposing limestone (pure CaCO3). In one kiln the reaction goes to 70% completion. What is the composition (by mass) of the solid product (CaO) withdrawn from the kiln? (Hint: there will be two separate product s..
the tie rod ab and a pipe strut ac are used to support a 100-kn load as shown in the figure. both members are made of
how much heat is needed to a 0.3m3 rigid volume containing saturated water vapor at 1000 kpa in order for final
a curved nozzle assembly that discharges to the atmosphere is shown. The nozzle mass is 4.5 kg and its internal volume is 0.002 m^3. The fluid is water. determine the reaction force exerted by the nozzle on the coupling to the inlet pipe.
a chemical plant produces an ammonia-rich waste gas that cannot be released as-is into the environment. one method to
a 1030 steel is given an improper quench and temper heat treatment producing a final structure composed of 60
a roast is in an oven and weighs 2.25 kg. it is initially at 6 degrees celsius and needs to be heated to 80 degrees
Evaluate the shearing and normal stresses at points H and J located at the ends of the horizontal and vertical diameters of transverse section located 2.5 in. to the left of bearing B.
water is heated by air in a heat exchanger. the water enters at 150 c and 0.2 mpa and leaves at 300 c and 0.2 mpa. the
steam at 200 c and 7 bars enters a mixing tank at a rate of 3 kgmin through a pipe with a cross-section of 1.20 cm2.
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