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At noon on a sunny summer day with a surface wind speed of 4m/s, SO2 is released over rough terrain from a 90m stack at a rate of 400g/s. Assume that the plume rise is 60m. Calculate the ground-level concentration: (a) 3000m downwind; (b) 3000m downwind and 100m crosswind; and 3000m downwind and 500m crosswind.
What is the velocity head expressed in atmospheres for a rapid filter operated at a surface loading rate of 475 m/d when the local porosity is 0.40?
Develop the mass balance equation and solve for the deficit concentration as a function of x, u, Lo, Do, ka, kd,and ks in the stream. Lo ans Do are the initial concentrations of BOD and DO deficit in the stream at x
determine critical depth in a circular pipe of 36 inches diameter and roughness coefficient of 0.015. The flow rate is 15 cfs. So = 0.002
The total dissolved inorganic carbon (TIC) of a sample of groundwater is 8.33 mM. The temperature of the aquifer is 15C, the pH is 7.5, and the ionic strength is 0.05 M. What is the H2CO3, HCO3-, CO3 2-, and the partial pressure of CO2? [Use activ..
To satisfy desige limitation it is necessary to determine the effect of the 2- kN tension in the cable on the shear tension and bending of the fixed I-beam.
determine the angular acceleration of the spool and the acceleration of the trailer. The wheels have negligible mass and are free to rotate.
The column is composed of two materials, the inner is brass with a diameter of 100mm and the outer is aluminum with a diameter of 150mm. A rigid flat plate is placed on top to insure that both materials move together when compressed.
An aluminum alloy tube of length 600mm and circular cross section with an inner diameter of 32mm and an external diameter of 36mm is subjected to an axial tensile force of 25kN. Find the change in length of the tube.
Outflow of water occurs from a cylindrical tank with a hole at the bottom. Find the height of the water in the tank at any time if the tank has a diameter 2 m, the hole has diameter 1 cm, and the initial height of the water when the hole is opened..
A laptop has a four year life span with an initial cost of $900 and $100 salvage value. According to the straight line method what is the depreciation charges you expect on the laptop
Analyze the stability of the dam shown in the figure, if the friction coefficient between concrete and foundation is 0.70, and the specific weights of concrete and water are 24kN/m 3 and 10kN/m 3 , respectively.
A 30mm pipe X 460 mm rectangular duct carries air. What size square conduit is needed to transport 4m cube per sec of water at a distance of 45m and head loss of of 1.08m.
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