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1.Ethane gas (C2H6) at 25C is burned with 150% theoretical air at 500 K and 1 atm. Find the heat transfer (in KJ/Kmol)from a steady-flow combustor if the products are at 1000 K and (a) complete combustion occurs; (b) 95% of the carbon is converted to CO2 and 5% to CO.
2.In swamped common-emitter BJT amplifier, as shown below, if Vcc = 12v, R1 = 8.2 k ohm, R2 = 10 k ohm, Rc = 500 ohm, Re = 1 k ohm, and Beta = 100, what is the transistor's emitter current?
The pavement structure consists of 160 mm of hot-mix asphalt (HMA), 150 mm of granular base and 450 mm of subbase placed over silty clay subgrade. The pavement is 20 years old and its current PCI is 50. The pavement currently exhibits low to medium a..
A 10-mm diameter bar of 1040 carbon steel is subjected to a tensile load of 50,000 N, taking it beyond its yield point. Calculate the elastic recovery (or strain) that would occur upon removal of the tensile load.
A small lake with volume of 20,000 m^3 has no natural pollutant sources. However, a sewage pipe discharges sewage containing an organic polluntant into the lake. Conditions in the sewage pipe are Qs= 0.5 m^3/s, and Cs= 100mg/L.
A sewage treatment works (STW) with 4 single-stage trickling filters has become organically overloaded due to the discharge of a biodegradable industrial effluent to the STW. This is causing effluent to pond on the surface of the filters.
a horizontal curve on a single-lane highway has its PC at station 124 + 10 and its PI at station 131 + 40. The curve has a superelvation of 0.06 ft/ft and is designed for 70 mi/h. What is the station of the PT?
At noon on a sunny summer day with a surface wind speed of 4m/s, SO2 is released over rough terrain from a 90m stack at a rate of 400g/s. Assume that the plume rise is 60m.
When water at 70C flows through a convergingsection of pipe, the pipe pressure decreases in the direction of flow. Estimate the minimum absolute pressure that can develop without causing cavitation.
The plate is submerged in a liquid is a vertical position with the parallel sides horizontal and the shorter parallel side at the top and exactly in the surface of the liquid.
The average P concentration in the runoff if the overall (agricultural and residential areas) runoff coefficient = 0.4, 40% of P is removed from the agricultural area by rainfall, and 90% of P is removed from the residential area by rainfall.
An equal-tangent sag curve has its PVI at station 10+00 and elevation at 138 ft. Directly above the PVI the bottom of an overpass structure is at elevation 162 ft. The PVC is at station 4+00. If the initial grade is -4.0%
The man has a mass of 75 kg, and the beam has a mass of 40 kg. The beam is in equilibrium with the man standing at the end and pulling on the cable. Determine the force exerted on the cable by the man and the reactions at pinned support C.
To float a 160 pound man using helium balloons (assume 0.52 cubic feet per inflated balloon). How many balloons would it take. Assume density of air is 1.29 kg/cubic meter and the density of helium is 0.179 kg/cubic meter.
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