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A wastewater is discharged to a stream with a reoxygenation constant of 0.5 day-1 and a velocity of 1 m/sec. The oxygen saturation concentration in the stream is 11 mg/L.
What couple moment does he exert. How much could he exert if he moved his hands to the ends so that his hands are 254 inches apart. What force must he apply at the ends to achieve the same couple mo
The town needs a total of 2 mgd. The capacity of well 1 is 5 million gallons per day, and that of well 2 is 10 mgd. Using calculus (hint: calculus with substitution), determine the optimal amount of
Imagine two small towns of 1,000 people: Blacktop and Parktown. In the urban sprawl that is Blacktop, all the residents own fuel-efficient cars (15 km/liter) and travel an average of 20,000 km per y
Northern Tundra Telephone (NIT) has received a contract to install emergency phones along a new 100-mile section of the Snow-Moose Turnpike. Fifty emergency phone systems will be installed about 2 m
If you deposit $1000 per month into an investment account that pays interest at a rate of 6% per year, compounded quarterly, how much will be in the account at the end of 5 years
The wastewater has a flow rate of 150 m3/hr, and is treated in a series of two completely mixed flow reactors which each have an equal volume. If the influent VOC concentration is 10 mg/L, what shou
Heyden Motion Solutions ordered $7 million worth of seamless tubes for its drill collars from the Timken Company of Canton, Ohio. (A drill collar is heavy tubular connection between a drill pipe and
Wheeling-Pittsburgh Steel is investigating whether it should it should replace some of the basic oxygen furnace equipment now or wait to do it later. The cost later (i.e. 3 years from now) is estima
A small blimp is temporarily moored wherein DC and the centerline of AB are coplanar. A force F from wind, weight, and buoyancy is shown acting at the centerline of the blimp. If F = 5i+ 10 j + 18
A floor is to be supported on hardwood timber joists that are spaced at 0.5m centres and span 5.0m. The joists support flooring 20mm thick and an applied live load of 2kN/m2 Design a typical joint 5
A hardwood beam of rectangular cross-section 150x300 is simply supported over a span of 8m, and is loaded as sketched. Determine the maximum deflection of the beam. (Youngs modulus E = 12 x 10^3 MPa
Draw the S.F.D and B.M.D for the beam as a single unit and determine the position and amount of hte maximum bending unit. 5kN 30kN 5kN A B C D E 2m width 2.5m width 2.5m width 2m width 20kN 20kN
Inital Cost=$40,000, Estimated Salvage Value (@ year 5)=18,000, Actual Salvage Value (@ yr.5)=20,000, Depreciation: Straight-Line (No half -year convention), Life=5yrs, Annual Benefit=10,000, and ta
One way to treat amd is to treat the metals in a holding pond. The first order rate constant is 10/day. The concentration in the water must be below 5 ppm. How long in hours will it take to reduce t
Assume the stream is 3ft wide and 1ft deep (assume a rectangular cross section. If the flow throught the stream is 1000 gallons/day and the concentration at the beginning of the stream is 250 ppm
Design a hardwood beam to support a uniformly distributed load of 20 kN over a simply supported span of 8 m. consider bending strength only. Assume that the weight of the beam is 2 kN.
If this rod is to be used again with an initially straight axis, determine the maximum permissible deflection that may be allowed during testing procedures. Young's Modulus = 210 kN/mm2 and Yield st
Discuss bracing types of buildings with real-life example. Provide photograph or sketch for each type of bracing.
Calculate the compression resistance of 200 UC 59.5 column which is 3.6 m high (between lateral supports). Both ends of the stanchion are held effectively in position but only one is also restrained
A rectangular beam of width 300 mm and depth 450 mm supports loads producing a shear force of 300 kN at a particular section. What shear stresses exist at the following points
Calculate the area of flow, hydraulic radius, wet perimeter, and top width of a 12-inch diameter pipe that flows at 1/4 of its capacity.
Estimate the hourly production and unit cost of rock excavation by drilling and basting. The rock is limestone having a seismic velocity of 6000 ft/s. Trial blasting indicates that 3" holes drilled
Constructing the foundation causes changes in the levels of vertical stress at all points in the soil. One such point lies at the centre of the footing plan, and is at a depth of 10 m. Determine the