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A device for performing boiling experiments consists of a copper bar (k = 400 W/m · K), which is exposed to a boil- ing liquid at one end, encapsulates an electrical heater at the other end, and is well insulated from its surroundings at all but the exposed surface. Thermocouples inserted in the bar are used to measure temperatures at distances of x1 = 10 mm and x2 = 25 mm from the surface.
Water, Tsat 105 q"s 106 W/m2. What are the corresponding values of T1 and T2 for q"s = 106 W/m2? If q"s were increased to 1.5 X 106 W/m2, could the foregoing results be extrapolated to infer the corresponding values of !l.Te, T1, and T2?
a vapor initially at 50 psia and 100 f state 1 is contained within a piston- cylinder device. the refrigerant is cooled
A piston-cylinder device contains 0.005 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 600 kPa. Heat is transferred at constant pressure until the temperature reaches 200°C.
a rankine power cycle uses 10.0 lbms of water witha high pressure of 100 psia low pressure of 1 psi.water enters the
carbon dioxide enters a two-stage compressor at 100 kpa and 300c and is compressed to a final pressure of 650 kpa. the
In a yogurt-filling line the containers are filled with 1 kg of yogurt. The mass of the yogurt is measured while the filling nozzle is open. The nozzle flow rate is 0.20 Kg/sec. Several factors affect the flow rate, including the density and the visc..
A tank of 20 ft3 volume is half-filled with liquid water, and the remainder is filled by vapor at 550 psia. The water is heated until one-half of the liquid (by volume) is evaporated, while an automatic valve lets saturated vapor escape at such a rat..
bc company wishes to enter a new market arena on the basis of its strength in core technologies and financial staying
1 a gas turbine power plant produces a net power output of 100 mw with an overall thermal efficency of 35a if the
A roller coaster and its occupant’s have a combined mass of 800 kg. At a height of 70 m, the roller coaster has approximately zero speed. At the bottom, at maximum speed, a piston/cylinder apparatus is compressed adiabatically in order to bring the r..
a 25-cm diameter rod is suspended horizontally in quiescent still air that is at 50degc. the rod is 250 cm long and is
Two kg water at 120C with a quality of 25% has its temperature raised 20C in a constant volume process. What are the heat transfer and work in the process?
An exact answer is not possible, but by making a reason- able guess of the number of landings per day and the number of days of service a rough estimate is possible.
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