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a- You are being asked to calculate the pH of a drop of pure rainwater at a temperature of 25oC. The total air pressure is 1 atm, and the raindrop is in equilibrium with the atmosphere. You may assume that the CO2 gas is equal to 400 ppmv. In order to get full credit for this problem you must list all unknown species that would exist in the raindrop and all pertinent equations regardless of their level of significance. You must algebraically solve the equations to determine pH.
b- Determine the pH of the raindrop if the CO2 concentration is 600 ppmv and 1,000,000 ppmv.
c- Determine the pH of water in a closed Calcium Carbonate Aquifer. Assume that the temperature is again 25oC, and that the aquifer material is pure Calcium Carbonate. Again you must list all species that exist in the system and all equations.
develop a spreadsheet application that will display in a table the values of modulus of elasticity Ec for concrete having unit weight ranging from 95 pcf to 155 pcf (in steps of 5 pcf) and compressive strength ranging from 3500 to 7000 psi
A 1: 1½ : 3 mix (by mass) has a water/cement ratio of 0.4 and a cement content of (400) kg/m3. The temperatures of the ingredients are as follows
Investigate the possibility of environmental problems that faced by the area of disaster.
A two thousand gallon tank has two influent streams. Influent one has a flow of 20 GPH and a salt concentration of 100 mM; influent two has a glow of 15 GPH and a salt concentration of 200 mM. What is the steady-state concentration of salt in the ..
The company would like to distribute the songs between the two CDs such that the used space on each CD is about the same. Formulate the problem as an IP, and find the optimal solution.
A block with an inclination of 20 degrees has a weight of 60kg, a height of 1.8m and width 1m, static friction is 0.3, what is the force needed and the height (where the force in the box should be) to pish it upwards
Radon from well water may pose a radiological health hazard. One treatment technique is simply to hod the water in storage, allowing the radon to decay. The decay rate is first order:
its desired to produce 5 cubic yards of cencrete with a ratio of 1:1.8:3.5 of cement, snd, and gravel what are the required amounts of components if 5.5 gallons of water per sack of cement is to be used
A 40 kg sheave a OF RADIUS R=350 mm. and cenral radiusof gyration k=250 mm carries a 160 kg load b and is suspended by a cable and a spring of modulus k=1.2 kN/m.
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.
Iron can exist in the FCC or BCC structure. For FCC iron, the crystal lattice parameter is a=0.3515nm and the atomic packing factor is 0.74. In an FCC structure, iron atoms have an atomic radius of 0.1263nm.
The flow is fully developed and laminar. Make use of the Navier Stokes equation to determine the relationship between the discharge and the other parameters involved, for the case in which the change in pressure along the channel is zero.
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