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The pH of clean rain is influenced by the partial pressure of CO2 in the atmosphere. In addition, acid rain can be formed when sulfur dioxide (SO2) is discharged into the atmosphere.
i) The atmospheric CO2 concentration could rise to 400 ppmv by 2020? Calculate the pH of clean rain in this scenario.
ii) Now assume that the atmosphere also contains 20 ppbv of SO2 . Calculate the pH of this acid rain?
Identical bricks 0.1m wide, and weighting 2kg are placed on a plate (assume the plate has neligible weight). Calculate the total weight (and force F required to balance the plate).
Truck B has an 8000-lb single axle and a 43,000-lb tandem axle. On a flexible pavement with a 3-inch hot-mix asphalt (HMA) wearing surface, a 6-inch soil-cement base, and an 8-inch crushed stone subbase, which truck will cause more pavement damage
The inlet of loe pressure turbine is 500Kpa and 500°C. Condenser operates at 10 Kpa. Determine the mass flowrate through boiler needed to produce 5000KW of power.
Writing case study about bridge collapse
a simple random sample of 20 items from a normal population resulted in a sample mean of 17.25 and a sample standard devation of 3.3 a. develop a 90% confidence interval for the population mean. b. develop a 95% confidence interval for the populatio..
Water flows through the pipe contraction shown. for the given 0.2 m difference in the meter level, determine the flowrate as a function of the diameter of the small pipe, D.
List some of the common sources of sulphate ions in natural and industrial environments. For a given sulfate concentration, explain which of the following solutions would be the most deleterious and which would be the least deleterious to a permea..
Assume a cross-sectional medial length of 32 in. (no stretching of the sheet due to bending). If the maximum shear stress must be limited to 19 ksi, determine the maximum torque that can be carried by the hollow section
What superelevation rate would you recommend for a roadway with a design speed of 100 km/hr and a radius of curvature of 500 m? Assume f = 0.11.
Pore water pressure is to be observed during the construction of the embankment. Calculate the pore water pressure which must not be exceeded at any point in the clay layer 9 m below the surface of the embankment to ensure a shear strength of 100 ..
A direct shear test is performed on a saturated specimen of loose sand. A normal stress equal to 100 kPa is applied and a maximum shear stress of 75 kPa is measured in the shear test. Determine the principal stresses and the orientation of these p..
Calculate the precentage of carbon hydrogen and oxygen in ethanoic acid.
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