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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?
The concentration of trichloroethelyne (TCE) in an air sample near a hazardous waste landfill is 34 ppm, the ambient air temperature is 31 degrees C, and the atmospheric pressure is 0.94 atm. What is the TCE concentration in mg/m^3
determine the practical moment strength phi x Msubn for a rectangular reinforced concrete cross section having a width (b of 13 in.) and an effective depth (d of 24 in.) The tension reinforcing steel is four no# 8 bars.
Consider a system that consists of 4 devices. The probabilities of failure for each of the devices are, respectively: 10%, 25%, 20%, and 30%. (a) If these components were in series, what is the probability that the system operates
Ethyl acetate is made from acetic acid and ethyl alcohol. Let x = pounds of acetic acid input, y=pounds of ethyl acohol input, and z = pounds of ethyl acetate output. The relationship of output to input is: z^2/(1.47x - z)(1.91y - z) = 3.9.
A simple curve has a central angle of 42 degreess. A point Y is located 24m from the vertex and has a perpendicular distance of 3.00m from the back tangent.
A lab experiment of permeability test was carried out on a cylindrical sample of sand 3 inch in diameter and 4 inch in height. 9 in3 of water was collected in 2 minutes, under a head (water level difference) of 11 inch. Compute the permeability in..
an insulated tank contains pressurized air at 2000 kPa and 30 degrees celcius. The air is allowed to escape to the atmosphere (P=95 kPa, T=30 degrees celcius) until flow ceases. Determine the final temperature in the tank.
A 170 kg granite rock (ρ = 2700 kg/m 3 ) is dropped into a lake. A man dives in and tries to lift the rock. Determine how much force the man needs to apply to lift it from the bottom of the lake. Do you think he can do it?
A particle of mass 200kg is lifted up vertically by a force of 104N. Assuming the acceleration due to gravity is 10meterper.secondsquare, write a program to calculate the upward acceleration of the particle.
The grains of wood in the board make an angle of 20 degrees with the horizontal as shown. Determine the normal and shear stresses that act perpendicular and parallel to the grains if the board is subjected to an axial load of 250 N.(Dimensions l=3..
A horizontal cylindrical tank 4 ft in diameter and 10 ft long is full of water. Find the work done in pumping the water to a point 4 above the top of the tank.
How will calculate the surface area of a rectangular open trench Length=100 mtr,Width=.6mtr,Depth= .75mtr.
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