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The total flow at a wastewater-treatment plant is 600 m3 day-1. Two bio-logical aeration basins are used to remove BOD from the wastewater and are operated in parallel. They each have a volume of 25,000 L What is the aeration period of each tank in hours?
The inflow to a small reservoir during a storm may be described by the equations Q=1000(1-e^-kt) where Q= flow in cfs k= runoff rate = 1.0 per hour t = time in hours The outflow through the dam gates is held constant at 800 cfs.
A dam located in a channel of rectangular cross-section which carries water flowing at a rate of 8.75m3/s. The depth of water upstream of the dam is 2.5m
An ocean outfall diffuser that discharges treated wastewater into the Pacific Ocean is 500m from a public beach. The wastewater contains 105 coliform bacteria per milliliter. The wastewater discharge flow rate is 0.3 m3/s.
A 96 pound mass is attached to a spring. If the fre- quency of simple harmonic motion is 13/pi cycles/s, what is the spring constant k? What is the frequency of simple harmonic motion if the original mass is replaced with an 288 pound mass?
For the cantilever beam shown the depth is h at the support. Find the required depth y as a function of the length x in order for all sections to be equally effective in their resistance to bending
Two parallel disks of diameter D are brought together, each with a normal speed of V. when their spacing is h, what is the radial component of convective acceleration at the section just inside the edge of the disk (section A) in terms of D, V, and h..
The reaction between 2-methyl-2-pentanol and HBr to yield 2-methyl-2-pentene is probably: A) an E1-type reaction involving the protonated alcohol as the substrate. B) an SN2-type reaction involving the protonated alcohol as the substrate.
Measurements of water-balance components have been made for a one-year period on a lake with an area of 4.4 km2 with the following results: P = 350 mm, Qsi = 2.33 x 107 m3, Qgi = 2.2 x 105 m3, Qgo = 0.6 x 105 m3, and Qso = .10 x 107 m3.
the break up of a liquid jet into droplets of diameter d depends on the jet diameter d the jet velocity v viscosity mu
Describe the given types of bonding agents found with clay minerals. a) hydrogen bond b) covalent bond c) van der walls forces d) james bond e) ward bonds f) war bonds.
There are two methods for determining the range from the SV to the REC in GPS. Code (C/A and P) and waves (L1 and L2) discuss two elements of GPS signals as they relate to each method. choose from the list of elements shown below.1.determination of t..
A step-type escalator as shown is designed to transport 120 persons per minute at a constant speed v=1.5 ft/s. The overall efficiency of the escalator is estimated to be 70%, and a 200% overload is to be allowed. Assuming that the average weight per ..
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