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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.
An open, clean glass tube (theta = 0 degrees) is inserted vertically into a pan of water. What tube diameter is neededif they water level in the tube is to rise one tube diameter (dueto surface tension)
a pre-engineering base line was run down a very steep hill.rather than measure horizontaily down hill with steel tape
A tower is guyed by cables AB and AC. A worker ties a rope oflength 12 m to he tower at A and exerts a constant force of 160 Non the rope.
a cast iron water main 14m long of 600 mm inside diameter and 30 mm wall thickness runs full of water and is supported
The daily concentration in the air for a given city is normally distributed with a mean of 0.03ppm and c.o.v. of 40%. Assume statistical independence between the concentration for any two days. Suppose the criteria for clean air standard require that..
THe upper end of the spring is welded to the lunger and the lower end is welded to the base plate. If the plunger is lifted 1.5" above equilibrium and released from rest, calculate its velocity as it strikes A.
A circular footing of diameter B is expected to carry a column load with some eccentricity. The moment of inertia of the footing about its diameter is piB^4/64. What would be the maximum eccentricity
Three pipes in a parallelsystem run between points A & B on a water distribution network delivering 400L/s. Pipe 1 is a 350 mm PVC main 4000 m long, Pipe 2 is a concrete pipe 250 m long and 80 mm in diameter
An intersection approach volume is 1,500 veh/h and includes 12% left turns with a through-vehicle equivalent of 2.3 tvu's/left turn. What is the total equivalent through volume on the approach
In an oedometer test, the void ratio of a clay sample changed from 1.62 to 1.41 as the vertical effective stress imposed on the sample was increased from 100 kPa to 200 kPa.
A cylinder fitted with a piston has a volume of 2ft^3 and contains 0.5 lbm of steam at 60 psia. Heat is tranferred to the stream until the temperatureis 500 F, while the pressure remains constant
Consider an asset that costs $712,000 and is depreciated straight-line to zero over its eight-year tax life. The asset is to be used in a five-year project; at the end of the project, the asset can be sold for $184,000
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