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A furnace cavity, which is in the form of a cylinder of 50-mm diameter and 150-mm length, is open at one end to large surroundings that are at 27°C. The bottom of the cavity is heated independently, as are three annular sections that comprise the sides of the cavity. All interior surfaces of the cavity may be approximated as blackbodies and are maintained at 1650°C. What is the required electrical power input to the bottom surface of the cavity? What is the electrical power to the top, middle, and bottom sections of the cavity sides? The backs of the electrically heated surfaces are well insulated.
Suppose that there is one input, labor (L), and that there are two outputs, goods 1 and 2. The production function for good 1 is y1 = f1(L), and the production function for good 2 is y2 = f2(L).
determine the thickness of steel plate required for a 2m diameter cylindrical boiler with hemispherical ends if the
steel rods rho 7832kgm3 cp 434jkg.k and k 63.9wm.k are heated in a furnace to 850degc and then quenched in a water
Air enters a turbine at 40 kN/m2, 900 C, and leaves at 10 kN/m2. The flow is reversible and adiabatic. Inlet velocity is quite low and outlet velocity is 150 m/s through a cross-sectional area of 0.20 m2. Calculate the power output in kW.
Determine the expected diffraction angle for the first-order reflection from the (310) set of planes for BCC chromium when monochromatic radiation of wavelength 0.0711 nm is used.
1. write out the differences betweena close system and open systemgive one example and state what type of system it isb
a piston-cylinder device contains 0.1 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 800 kpa. heat is
a carnot heat engine operates between 40c and 320 c. what is the thermal efficiency? if the work output is 200 kjkg
the superheated water vapor at 50 kpa and 100degc is compressed isentropically in a closed system to 4 mpa. determine
A fire truck draws water from an open constant-level reservoir through a hose of 0.2 ft2 cross section. The water is discharged from the pump through another 0.2 ft2 hose to a surge tank pressurized to 120 psig with air at the top. The pump adds 970 ..
A closed rigid, well-insulated tank contains 2 kg of saturated mixture of water at 159kPa. Initially, three-quarters of the mass in the tank is saturated liquid. An electric resistance heater placed in the tank is connected to a 11-V source and curre..
to find the minimum distance b to get the ball over the top im not sure weather you use conservation of mech energy or
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