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A community had a population of 200,000 in 1995 and it is expected that this will increase to 260,000 by 2010. The water treatment capacity in 1995 was 165 ML/day. A survey showed that the average per capita water use rate was 700 L/(person.day). Estimate the community’s water requirements in 2010 assuming
i) No change in use rate, and
ii) A reduced rate of 600 L/(person.day).
iii) Will expanded treatment facility be needed by 2010 for condition (i)? For condition (ii)?
A barometer filed with non-toxic glycerin is used to measure standard sea level atmospheric pressure. neglecting the effect vapor pressure and surface tension. calculate the atmospheric pressure head.
One accident mitigation procedure is called emergency material transfer, in which the material is transported away from the accident site before it becomes involved. We plan on mitigating a crude oil tank fire scenario by pumping the tank empty in..
determine the stresses in the steel and concrete under the service loads
At what depth will water flow in a 10 m wide rectangular channel, if n=0.01, S=0.0015 and Q=9m^3/s
$25,000 is deposited in a savings account that pays 10% interest, compounded monthly. Equal annual withdrawls are to be made from the account, beginning one year from now and countinuing forever.
Determine the torque that the Titanium Alloy shaft can transmit if the allowable angle of twist is 0.375 RAD. Assume the torque is applied at the end of the shaft. The shaft is 2 meters long and has a diameter of 25 mm.
Design a rectangular channel contraction from width b1 (upstream) to width b2 (downstream). Assume uniform flow approaches the contraction (i.e. normal depth approaching the channel contraction).
A two-bed carbon adsorption system is to be designed to handle 8000 acfm of air containing 700 ppm of hexane. Laboratory studies indicate that carbon can adsorb 8lb hexane per 100 lb carbon under the conditions at which the system will be operated.
When the total pressure acting at midheight of a compressible clay layer is 100 kN/m^2, the corresponding void ratio is 1.09. When the total pressure increases to 400 kN/m^2, the corresponding void ratio decreases to 0.89.
Why do owners prefer the design-build form of contracts when many of them know they can obtain better quality construction using other forms. What are the stages at which the designer will schedule design reviews.
A frictionless piston-cylinder contains 2kg of nitrogen at 100 kPa absolute and 300 deg K. The system is compressed polyprotically at a 1.4 exponent (n) until the nitrogen reaches a final temperature of 360 deg K.
A chemical is added at the beginning of a water treatment plant at a dose of 750 lb/day. The water treatment plant provides water to a community of 200,000 people and the average water consumption in the city is 110 gallons per capita per day (gpc..
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