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Estimate the amount of Ca(OH)2(s) leached from concrete during a one-year period by precipitation. Assume that the area receives 40 in/yr of precipitation which is in equilibrium with PCO2= 10^-3.5 atm and [SO42-] = 10^-4 M. Assume that:
a. The rain and concrete reach equilibrium rapidly.
b. The remaining chemistry of the concrete does not impact leaching of Ca(OH)2(s).
c. Within the concrete, assume a closedsystem with CT in solution equal to that in the incoming precipitation
Steam enters the turbine of a single vapor power plant with a pressure of 10 MPa and a temperature of 580 C and expands adiabatically to 6 kPa. The isentropic turbine efficiency is 85%. Saturated liquid exits the condenser at 6 kPa and the isentropic..
Differntial Leveling between BM's A,B,C,D, and A gives elevation differences (in meters) of -15.632, 32.458, 38.214, and -55.025, and distances in km of 4.0, 6.0, 5.0, and 3.0 respectively.
The storage in a reach of river is 20,000 m^3 at a given time. Determine the storage 1 hr later if the average rates of in flow and out flow during the hour are 20 and 18 m^3/s, respectively
Sometimes the side of concrete bridges is observed to turn black in colour. What is the reason for this phenomenon?
The article "Leachate from Land Disposal Residential Construction Waste" (authored by W.J. Weber, Y.-C Jang, T.G. Townsend, and S. Laux, Journal of Environmental Engineering, 128(3): 237 - 245, 2002) presents a study on contamination
a round steel alloy bar with a diameter of 0.75 in and a gauge length of 3.0 in was subjected to tension, with the results shown in the accompanying table. using a computer spread sheet program, plot the stress-strain relationship.
A 5000 lb truck is being used to lift a 1000 lb boulder B that is on a 200lb pallet A. Knowing the acceleration of the truck is 1ft/s^2, determine a) the horizontal force between the tires and the ground,
It is desired to obtain dynamic similarity between 3 cfs of water(ρ = 1.94 slug/ft3, μ= 2.735 x 105Ibs/ft2) flowing in a pipe and oil 9s.g = 0.91, μ=12 x 105 ibs/ft2) flowing in a 12in diameterpipe at a velocity of 25 ft/s at 90 deg F. What size of p..
A rural town with sewered population of 4,500 has a daily wastewater flow of 1,590 m3/day with an average BOD of 280 mg/L including industrial wastes. The industrial discharges to the municipal sewers are 57 m3/day at 1,800 mg/L BOD from a slaughterh..
A Charpy V Notch test was conducted for an ASTM A572 Grade 50 bridge steel. the average values of the test results at four different test temperatires were found to be
Air at 90 psia and 70 degrees F flows through a 4.5 inch diameter welded steel pipe (e = 0.00015) at 60 lb/min. Find the friction head loss and pressure drop in 200 ft of this pipe. Assume the air to be of constant density.
A pole is held vertically on a soil surface by three equally spaced wires tied to the top of the pole. Each wire has a tension of 1 kN and is inclined at 45 degrees to the vertical.
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