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A community has a current population of 2800. It is estimated that in 20 years its population will be 38,000. The saturation population is 80,000.the total water consumption at present has been estimated to be 4.0 million gallons perday. the treatment plant has a capacity of 9.3 million gallons per day. Determine how many years from now the consumption will reach its design capacity with current usage rates if the community has a declining growth rate.
On a single graph, show how the Gibbs energies of each of these phases vary with temperature between - 20 C and 150 C for a constant pressure of 80 kPa. You can start your computations at the triple point
A circular hatch, 2-m in diameter has its top 10-feet under water ( fresh water s.g. = 1.0), and is hinged on the bottom, and held closed on the top with a single bolt. Perform a moment balance about the hinge
Why do the X components of the reaction forces need to be considered when resolving the moment about point A
Two identical squares (each18x18mm ) sit on the x axis and are joined at the y axis to form a rectangle. What is the rectangle's product of inertia
Determine the maximum and minimum stress intensities in the section.
Soil is excavated from a borrow to construct an embankment with a net volume of 50,000 cy with 95% of Modified Proctor maximum dry density of 110 pcf with a Modified Proctor optimum water content of 8%.
how far back from the front axle would the center of gravity have to be to ensure that the maximum tractive effort developed for front- and rear- wheel-drive options is equal (assume that all other variables are unchanged)
a saturated silty clay encountered in a deep excavation is found to have a water content of 23.5%. determine its porosity and bulk unit weight.
Biological treatment processes for wastewater can be catogarised as dispersed growth and attached growth systems. Discuss the advantages and disadvantages of attached growth systems over dispersed growth systems.
A tank operated as a CFSTR used to remove benzene from a flow stream is 1500 m3 in size. The flow rate in and out of the tank is 8 m3/day. If the influent benzene concentration of 265 ug/L and the effluent concentration is 12 ug/L
ACME supplies prepackaged steel framed and sheathed storage buildings in kit form. The standard column used is a steel hollow round tube with a wall thickness of 0.4 inches fixed at both ends.
What is the design storage and water surface elevation at the peak outflow rate and estimate the long-term average reduction (EPA, 1986) in particulates under dynamic conditions.
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