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1.Combustion of fuel in air is performed at constant pressure with anair-to-fuel mass ratio of 18.Using an average gas specific heat(Cp) of 1100J/kg/oC and a net fuel heatingvalue of 40 MJ/kg,calculate the gas temperature increase fromcombustion without heat loss
2.The metropolitan Atlanta area contains nearly 5 million people over16,000km2.The average Atlantan drives 32miles perday.Emission factors for gasoline vehicles are 0.4g/mileNOx and 3.4g/mile CO.Compute daily sources of CO andNOx(kg/day).
3.A sanitary landfill has an available space of 125,000 m2and a depth of 10 m. 765 m3 of solid waste aredumped at the site 5 days per week. The waste is compacted totwice its delivered denisty. Esimate the expected life of theland-fill.
Benzene is a toxic chemical used in the manufacturing of mechanical chemicals. A manufacturer claims that its exit (effluent) water meets the federal regulation standards with a mean of less than 7980 ppm of benzene.
The pollutant has a reaction rate coeeficient k of 0.25/day. Assuming is pollutant is well mixed in the lake, find the steady-state concentration of pollutant in the lake.
Wastewater from a paper mill contains ultimate BOD of 200ppm and DO of 3ppm, water is discharged at a rate of 100,000 gallons per day into a river, the river has a flow of 1 million gallons per day with no BOD
a model rocket is launched straight upward. its altitude y as a function of time is given by y bt -ct2 where b 82 ms
standard air is drawn from the atmosphere into a 1.25 m diameter cylindrical duct by a fan mounted inside the duct. This air is discharged down stream from the fan through a 0.6 m diameter duct at a velocity of 25 m/s and atmosphere pressure.
For the data given below, derive the 2-hr unit hydrograph for a watershed having a drainagearea of 216 km^2, assuming a constant baseflow of 20 m^3/s.
If 90% of the weight of this brown sugar is sucrose (C12H22O11), what mass of dissolved oxygen would have been required to degrade this mass of sucrose had some not been recovered from the barge prior to its dissolution and dispersion into the riv..
Devise an absolute temperature scale where the boiling point of water at 1 atmosphere (101 kPa) pressure = 100 degrees in your scale. What is the ice point of water in your scale
Calcium sulfate (CaSO4, solubility product Ksp=2*10^-5 M^2), is added to initially pure water, such that solid CaSO4 remains at equilibrium. (Assume the sulfate does not participate in reaction other than the solubility product; no HSO4- formed).
consider the steady viscous flow through a small horizontal tube. for this type of flow, the pressure gradient along the tube should be a function of the dynamic viscosity, the mean velocity and the diameter of the tube
A manometer is used to measure the pressure difference between points A and B in a pipe. Water flows in the pipe, and the specific gravity of the manometer fluid is 2.8. The distances and manometer deflection are indicated.
One method used to store energy during times of low demand is by pumping water uphill into a reservoir. When energy demand exceeds the output produced by power plants, the water is released, moves downhill, and is converted into electricity by a t..
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