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A person may demonstrate observable effects on the central nervous system when exposed to carbon monoxide at a concentration of 50 ppm, may lose consciousness at a concentration of 250 ppm, and may die at a concentration of 750 ppm. A "typical" urban environment produces carbon monoxide at a rate of 1.2 L/m2-hr. If a temperature inversion forms over the city at a height of 0.70 km, how long will it take the carbon monoxide concentration to reach 50 ppm if the wind velocity is zero? If the wind velocity is 1 m/s, what steady-state concentration of CO will be observed? Assume that the city is approximately square, 20 km on each side.
A backsight reading of 2.56 was obtained with rod at A and a foresight reading of 7.45 was obtained with the rod at the trial point B. If B is located 37.00 feet from the center line of a planned 50-foot wide road, is the catch point located uphi..
If the heading of a member function of a class ends with the word const, then the function members cannot modify the private member variables, but can modify the public member variables. the function members cannot modify the public member variables,..
The subway train is traveling at a speed of 54 km/hrwhen the brakes are fully applied on the wheels of cars B and C,causing them to slide on the track, but are not applied on car A.μ of kinetic friction= 0.35.
A new section of richmod highway is being designed as a six-lane facility (three in each direction) with a two-way, left-turn lane. Determine the peak hour LOS.
As part of the procurement or contracting department of this federal agency, you need to demonstrate your understanding of the different project delivery methods and contract types available to the agency.
A 2000-pound, counterbalanced, propane forklift can be purchased for $30,000. Due to the intended service use, the forklift's market value drops 20% of its prior year's value in Years 1 and 2 and then declines by 15% until Year 10
you fill a 2-cubic wheelbarrow to the top with aggregate. if the specific gravity of the aggregate is 2.548, and 18% of the aggregate is void spaces, how much does the aggregate in the wheelbarrow weight
in an ore-mixing operation a bucket full of ore is suspended fromnbspa traveling crane which moves along a stationary
A compressible clay layer 10.0m thick has an initial void ratio in situ of 1.026. Tests and computations show that the final void ratio of the clay layer after construction of a structure is 0.978. Determine the estimated primary consolidation set..
If the farmer irrigates continuously, what will be the steady-state concentration of selenium in the stream downstream from the farm (after the irrigation run-off returns to the stream)?
An elbow, 90 degrees smooth bend flanged, is used in the Alaskan pipeline. Inside pipe diameter is 48 inches. Flow is 1.6 million barrels a day. 1 barrel=42 gal. Velocity is 8.27 ft/s. SG=0.93
Calculate the stress in a No. 7 rebar subjected to a tensile load of 10,600 lb (in ksi).
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