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100 kmol/h of biogas (75 mol% CH4 and 25 mol% CO2) is produced in a digester and is drawn off from the headspace under a slight vacuum and piped to a natural gas burning boiler. A slight leak develops in the pipe allowing air (79 mol% N2 and 21 mol% O2) to enter and mix with the biogas. Biogas becomes flammable if the oxygen content exceeds 5 mol% in the mixture. Determine the maximum size the leak can be (in kmol/hr) before a safety hazard develops?
Determine Fourier Number, Compare two identical steel spheres, except the first has a two inch diameter while the second sphere has a four inch diameter. The larger sphere will have a Fourier number approximately
nitrogen at 80 kpa and 400 k enters an adiabatic diffuser steadily at a flow rate of 6000 kgh at 230 ms and leaves at
an ideal gas at 100 kpa and 15 degrees c enters a steady-flow compressor. the gas is compressed to 600 kpa and 10 of
rope AB an AC are thrown to a boater whose canoe has capsized.Given that the angle is 25 and the magnitude of the force FR exerted by the river on the boater is 70N determine the tension in rope AB , in rope AC.
a thin metal disk of mass m2.00 x 10-3 kg and radius r2.20cm is attached at its center to a long fiber. when the disk
Air at 22 kPa, 220K and 250 m/s enters a turbojet engine in flight at an altitude of 10,000m. The diffusor slows the air down to a very low speed relative to its inlet. The pressure ratio across the compressor is 12. The turbine inlet temperature is ..
a piston of diameter 100 mm moves inside a cylinder of 100.1 mm diameter. find the percent decrease in force necessary
the 150-lb fireman is holding a hose which has a nozzle diameter of 1 in and hose diameter of 2 in. if the velocity of
in a reversible process nitrogen is compressed in a cylinder from 100 kpa 20oc to 500 kpa. during the compression
the small two-story office building shown in fig.p4.10 has 36000 ft3 of occupied space. due to cracksaound windows and
5ft3 of ammonia is initially at 100 psi and a specific volume of 0.024ft3lbm is heated or cooled to make this an
a high strength steel drill rod used for boring a hole in the earth has a diameter of 0.5 in. the allowable shear
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