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1.A rectangular steel bar has cross-sectional dimensions of 12mm by 25mm and is 210 mm long. Assuming that the bar has pinned ends and is made from AISI 1141 OQT 1300 steel, compute the critical load when the bar is subjected to an axial compressive load.
2.A biodegradable wastewater is to be treated in a CMFR. The BOD5 reaction(removal) rate coefficient is 0.15/day. The CMFT has a 4000 gallon volume. What wastewater flowrate can be treated in this CMFR in order to remove 98% of the BOD5? What Volume of CMFR would be required to remove 92% of the BOD5 at the calculated flowrate?
The results of his experiment are tabulated below. Assuming the experiment was conducted in a completely-mixed batch reactor, determine the decay rate constant for the die-off of anthrax.
Calculate the length of 10 equal-sized aeration basins for secondary treatment of a wastewater flow of 10 MGD with 20,000 lb of BOD per day for a conventional activated sludge process with a maximum loading of 40 lb BOD/ 1000 ft3*d.
one gallon of paint(volume=3.78 x 10^ -3) covers an area of 25 m^2. what is the thickness in mm. of the paint on the wall
The coordinates for the benchmark are 1421334.93,783207.62 the first point in the survey for oleson village, is 113.66 feet from the benchmark and at a bearing of n5d27'23"w. this is other survey point 542.16 So how dose this work?
The heated water outflow from a nuclear power plant is cooled in a 50-m wide rectangular channel that has a discharge Q = 225.0 m^3/s. The Manning's n is 0.015 and the bed slope is 5.0 X 10^-4
Given the following geometry of an intersection: Four lanes fornorth and southbound traffic; two lanes for east and west boundtraffic. The peak hour volume for: northbound traffic is 1400vehicles with 10% left and right turns,
The 3.5-Mg engine is suspended from a spreader beam having a negligible mass and is hoisted by a crane which exerts a force of 40 kN on the hoisting cable. Determine the distance the engine is hoisted in 2.4 s, starting from rest.
The National Institute for Occupational Safety and Health (NIOSH) sets standards for CCl4 in air at 12.6 mg/m^3 of air (a time average over 40 hr). The CCl4 found in a sample is 4800 ppb. Does the sample meet the NIOSH standard
design a cylindrical composite column consisting of some steel rods, and also wrapped in nano-fiber material. The column must support a compressive axial force of 500 kips. The columns length is 5 ft.
A steam locomotives had scoops installed that took water from a tank located between the tracks and lifted water into the tender. To lift the water 12 ft with a scoop, neglecting all losses, what speed in mph is required
If fy = 60,000 psi and fc' = 5000 psi, what is the nominal flexural strength, and what is the maximum moment that can be utilized in design, according to ACI Code
Steam enters a turbine with neglible velocity at 4 mpa, 600 degrees celcius and a flow rate of 36000 kg/h. Determine the heat loss from the steam passing through the turbine if the turbine has a power output of 20000 kw
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