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Consider 0.8 grams of air (which may be assumed to be an ideal gas) at 295 K and 1.5 bar trapped in a rigid tank. An electrical heater is operated for 30 seconds. During this time the voltage across the heater is 12 V and 0.6 amps pass through the resistance element. During this process, 126 J of energy is lost via heat transfer through the tank walls.
Assuming the specific heats of air are constant (at the 300 K values (use table B.9)) determine the final temperature of the air. Hint: Use the prop. relationships.
Determine the final pressure in the tank.
a rigid container is filled with steam at 700 kpa and 200oc. at what temperature will the steam start to condense when
a feedwater heater uses extracted steam p1500kpax1100 to preheat feedwater t250 celcius p2500kpa. assuming no heat
ammonia vapor flows through a valve. it enters the valve at a pressure of 8 bar and a temperature of 120c and after
the 3.25-kg collar shown below is attached to a spring and released from rest at a. the collar then travels downward a
a four-cylinder engine with a 9.5-cm bore and an 8.75-cm stroke has a 7 clearance. the engine rotates at 2500 rpm. the
a cold storage room has walls made of 0.23 m of brick on the outside 0.08 m of plastic foam and finally 1.5 cm of wood
a rigid tank of volume 6 m3 contains argon at 500 kpa 30oc. it is connected to a piston cylinder initially at the
Determine the angular velocity of the two 10-kg rods in Fig. 2 when , if they are released from rest in the position . Neglect friction.
a 4m long quarter-circular gate of radius 3 m and of negligible weight is hinged aboutnbspits upper edge a. the gate
a 180 degree elbow takes in water density water 1000 kgm3 at an average velocity of 1 ms at the horizontal inlet where
Using a centrifugal pump, and a flow rate of 60 gal/min, calculate the break hp of the pump using water with a density of 62.4lbm/ft3 and do the same for a nonviscous liquid having a density of 0.85g/cm3.
a one dimensional wall of material kw10wmk is 50 mm thick with uniform heat generation qlsquolsquolsquo5106wm3. the
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