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1. A lagoon is to be designed to accommodate an input flow of 0.10 m3/s of non-conservative pollutant with concentration 30.0 mg/L and reaction rate 0.20/day. The effluent from the lagoon must have pollutant concentration of less than 10.0 mg/L. Assuming complete mixing, how large must the lagoon be?
2.How much extra water does a 175 - lb concrete canoe displacecompared to an ultra-lightweight 38 - lb Kevlar canoe of the samesize carrying the same load?
Pure n-butane is contained in a laboratory cell in which the volume can be varied. The cell is maintained at a temperature of 200°F. The volume is changed until a few drops of liquid n-butane are present. What is the pressure in the cell
A particular soil has a total (moist) unit weight of 122 pcf and a dry unit weight of 101 pcf. The specific gravity of soil is 2.70. Calculate the water content and degree of saturation.
the long-term average january precipitation in the colorado river basin is 1.11 inches with a standard deviation of
Two simply supported beams are coupled so their centers have equal deflections. The upper beam has length L1 and lower beam has length L2. Determine the deflection of the center of the beams.
a saturated silty clay encountered in a deep excavation is found to have a water content of 23.5%. determine its porosity and bulk unit weight.
horizontal pipe, and the fanning friction factor is f_F = 0.0060. what error in the pressure drop would ensue if the assumption were made that the flow was laminar, abandoning the previous value of the friction factor.
Using the Gumbel probability function, estimate the probability that a maximum 24 hour depth in any year will exceed 160 mm. What is the probability that the maximum 24 hour depth will exceed 125 mm
friction on the concrete surface creates a couple moment of 100 Mm on the blades of the trowel. Determines the magnitude of the resultant couple forces so that the resultant couple on the trowel is zero
if the velocity of the sled 10 sec from the start is 200mi\hr, determine the time average R of the total aerodynamic and mechanical resistance to motion. neglect the loss of mass due to exhausted fuel compared with the mass of the sled
Determine the torque that the Titanium Alloy shaft can transmit if the allowable angle of twist is 0.375 RAD. Assume the torque is applied at the end of the shaft. The shaft is 2 meters long and has a diameter of 25 mm.
A ground level source is emitting pollution. An air sampler is located 1 km downwind and 0.5km crosswind of the source measures the concentration of the pollutant ant ground level as 10 micrograms/cubic meter.
The column is constructed from high-strength concrete and four A-36 steel reinforcing rods. If it is subjected to an axial force of 37.5 kN , determine the required diameter of each rod so that one-fourth of the load is carried by the concrete
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