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In a chemical plant liquid ammonia is stored in a large tank at 72 degrees F and 200 psig. Ammonia is pumped from this tank to a smaller tank for chemical process usage. The pump used to supply ammonia to the process tank is located 12 ft above the surface of the ammonia in the storage tank. If the frictional losses in the plumbing system leading to the pump are 3.5 ft, what is the net positive suction head (NPSH) available at the pump inlet?
a thin-walled circular tube must support a torque of 6 kn.m and a pure bending moment of 4.4 kn.m. if the wall
in the following experiment a constant-pressure calorimeter containing 100 ml of h20 is used.the initial temperature of
the aluminum plate of thickness t 3.5 mm. is to be designed so the maximum stress remains below 100 mpa. the hole must
in a certain process the working fluid is cooled until 200 btulbm has been extracted. during this process 200 btulbm is
an ideal vapor compression refrigeration cycle that uses r-134a maintains a pressure in the condenser of 1000kpa and
Hot coffee of temperature T[infinity] = 90°C is poured into a cup whose wall is initially at the temperature Ti= 10°C. The porcelain wall of the cup is 0.5 cm thick. The heat transfer coefficient between the coffee and the wetted surface is h= 700 W/..
(i) Name any incongruent melting intermediate compound(s) present. (j) Locate and draw a square around all congruent melting equilibria. (k) Label all the two-phase fields. (l) Is either Ti or Ni allotropic?
a refrigerator uses refrigerant-134a as the working fluid and operates on an ideal vapor-compression cycle between 0.12
the jet engine mass m 400kg of a passenger airplane is attached to the planes wing by a connector that has an
saturated steam at 2 mpa is contained in a piston-cylinder device. the initial volume is 0.25 m3. heat is slowly
consider a 210mw steam power plant that operates on a simple rankine cycle. steam enters the turbine at 10mpa and 500oc
a 2500 kg car traveling at 25.0 ms stops in a distance of 0.300 m after colliding with a tree. what is the acceleration
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