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The 60W fan of a central heating system is to circulate air through the ducts. The analysis of the flow shows that the fan needs to raise the pressure of the air by 50Pa to maintain flow. The fan is located in a horizontal flow section whose diameter is 30cm at both inlet and outlet. Determine the highest possible average flow velocity in the duct.
consider the sysstem shown in figure 3-45 where m 2 kg b 4 nxm and k 20 nm. assume that x0 0.1 m and xdot0 0. the
find the diameter given flow rate and pressure what diameter orifice hole d is needed if under ideal conditions the
air enters a compressor at 105 kpa and 300 k with a volumetric flow rate of 12 m3min and exits at 1200 kpa and 400 k.
heat is transferred steadily to boiling water in a pan through its flat bottom at a rate of 650 w. if the temperature
a wind-turbine generator is designed to produce 3.5 x 106 kwhr per year with an annual plant factor of 0.40. the design
a 20 mm diameter steel bar is to be used as a torsion spring. if the torsional stress in the bar is not to exceed 100
a massive precisely machined 6-ft-diameter granite sphere rests upon a 4-ft diameter cylindrical pedestal as shown in
aluminum atoms have a radius of 0.1431 nm and they form into face-centered cubic fcc crystals.a calculate the density
an alcohol solution contains 6 by mass ethanol. this solution is fed to a distillation column at a rate of 1000 kgh.
1 kg of refrigerant 134a is contained in a piston-cylinder assembly initially as saturated vapor at 16 bars. the
Determine the adiabatic flame temperature for constant pressure combustion of a stoichiometric propane air mixture assuming reactants at 298 k . No dissociation of the products and constant specific heats evaluated at 298 k.
an object with a mass of 5 kg undergoes a process during which there is heat transfer from the object at a rate of 5 kj
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