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A result of a 7-day BOD test performed on a sample from anoligotrophic lake was 10 mg/L. The base 'e' BOD rate constantdetermined from previous studies was estimated to be 0.10d-1. Determine the ultimate BOD and 5-day BOD of thesample taken from the lake.
each wire has a tension of 1kN and is inclined at 45 degree to the vertical. calculate the increase in vertical stress at a depth 1 m below the surface and the amount of elastic settlement below the axis of the pole if E = 40 Mpa and v=0.45
What are the inputs needed to determine stress a polymer with a fixed end on one side, and the other with a tension force of 50,000 lbs a year after the load is applied
a section of highway has a speed flow relationship of the form q= au^2 + bu it is known that at capacity ( which is 3100 veh/h) the space-menu speed of traffic is 28 mi/h. determine the speed when the flow is 1500 veh/h and the free flow speed.
A rectangular tube has an outside dimensions that are 2in wide and 4in deep and a wall thickness of 0.25in. The tube is acted on by a bending moment of 12,000lb-in.
A 600 MWe power plant has an efficiency of 36% with 15% of the waste heat being released to the atmosphere as stack heat and the other 85% taken away in the cooling water.
A canal cut in rock (n= 0.030 is trapezoidal in section with the bottom width of 6.10m and side slopes of 1 on 1. The allowable average velocity is 0.76 m/s. What slope will produce 5.66 m^3/s
Two new rides are being compared by a local amusement park in terms of their annual operating costs. The two rides are assumed to be able to generate the same level of revenue (and thus the focus on costs).
Briefly explain the purpose of the International Space Station, and list the name of all space agencies involved in building and operating it.
An object has a mass of 46kg and weighs 450N on a spring scale. Determine the acceleration due to gravity at this location.
State the two main reasons why an activated sludge system is operated at a relatively low food/microorganism ratio.
a 96-in diameter cast iron pipe carries water at 60f. the head loss due friction is 1.5ft per 1000ft of pipe. what is the dischage capacity of the pipe
if the resultant of the 1000 lb vertical force and the tensile force T in the cable is to be in the direction of the boom OB, what must be the magnitude of T
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