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A community has a current population of 15,000. 10 years ago, the population was 12,500 and the community has a declining growth rate with a saturation population of 22,000. The total water consumption for the community at present is 2.25 million gallons per day. The treatment plant has a capacity of 0.3 million gallons per day. Determine how many years from now the consumption will reach 85% of its design capacity if current water usage rates remain steady.
Introduction to management science, The Dynaco Manufacturing Company produces a particular product in an assembly line operation. One of the machines on the line is a drill press that has a single assembly line feeding into it.
A sample of dry sand with a specific gravity total of 16.49 kN/m3 and a relative density of 2.67 grains, is placed outdoors. During a rainy period, the sample volume remains constant but the degree of saturation increases to 40%.
Calculate the distance traveled by the prey from the time it is dropped until the time it hits the ground. Express your answer correct to the nearest tenth of a meter.
A tray rests on an extendible arm consisting of two steel tubes with two different outer diameters. The downward force at the tray center F0 = 1000 N. Determine the downward deflection of the tray center and the tilt angles of the tray about each ..
An open clean glass tube, having a diameter of 3 mm is inserted vertically into a dish of mercury at 20c .How far will the column of mercury (S.G =13.6) in the tube be depressed in (mm) given the following information. Theta = 130 and surface tens..
One kilogram of air (which behaves as an ideal gas) in a piston-cylinder assembly is subjected to two separate processes from the same initial to the same final state: at the initial state the air has a volume of 1,000 L, a pressure of 10^5 N/m2,
What are the public safety implications of a flaw in a computer chip that is going to used to control a variety of instruments
use zero through forth order taylor series expansions to predict f(2.5) for f(x) = ln x using a base point at x=1. compute the true percent relative error for each approximation. discuss the meaning of the results.
A stream with a flow of 22 mgd contains 180 mg/L of sodium cyanide in the form of NaCN. Chlorine can be added to destroy the NaCN waste according to the reaction shown below. Find the theoretical minimum amount of chlorine required (in lb/day).
During a particular 30-day period, the streamflow flowing into a reservoir averaged 5.0 m3/s. Water supply withdrawals from the reservoir averaged 136 mgd. The only other outflow from the reservoir was 9.4 cm of evaporation from the water surface.
At the proportional limit, . gage length of a -diameter alloy rod has elongated . and the diameter has been reduced . The total tension force on the rod was . Determine the following properties of the material
What is the velocity head expressed in atmospheres for a rapid filter operated at a surface loading rate of 475 m/d when the local porosity is 0.40?
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