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Above a peninsula of land. the length of the box is 25 km, its width is 80 km, and a radiation inversion restricts mixing to 25 m. Wind is blowing clean air into the long dimention of the box at 0.8 m/s. Between 4 and 6 pm there are 100,000 vehicles on the road, each being driven 60 km and each emitting 6 g/km of CO.
a) Find the average rate of CO emissions during this two hour period
b) Find an estimate of the concentration of CO at 6 PM if there was no CO in the air at 4 PM. (Assume that CO is conservative and that there is instantaneous and complete mixing in the box)
Rhodium has an atomic radius of 0.1345nm and a density of 12.41g/cm^3. determine whether it has an FCC or BCC crystal structure.
Design a horizontal curve with a 40-degree central angle (delta=40) for a two-lane road with 11-ft lanes. The design speed is 70 mi/h and superelevation is limited to 0.06ft/ft. Give radius, degree of curvature, and length of curve.
A water treatment plant is being designed for a flow of 1.6 m^3/s. How many rapid sand filters, using only sand as the medium, are needed for this plant if cross-sectional area of each filter is 10 m x 20 m?
A 20,000 gal. capacity tank contains 8,000 gals. ofwater/solids mixture at a density of 12 pounds per gal.(ppg). Fresh water (8.34 ppg) is added at a rate of 10 gallons per minute(gpm).
Often times, this pressure comes from the fact that community's water supply is stored in an elevated reservoir. Determine how high an elevated reservoir must be so that the water supply has a pressure of 50 psi. Given: the unit weight of water is..
A two stage high rate trickling plant is to treat a municipal wastewater having a flow of 2.0mgd. pertinent data: influent BOD5 = 200mg/l, BOD5 removal by primary clarifier = 33%, filter bed depth = 5 to 7ft,
Determine the maximum bending stress that will occur in a timber beam of rectangular section 250mm x 80mm when a bending movement of 500N is applied about the x-x axis
If you deposit $1000 per month into an investment account that pays interest at a rate of 6% per year, compounded quarterly, how much will be in the account at the end of 5 years
Calculate the stress at failure of a concrete test cylinder with a measured diameter of 152.4 mm and a recorded load of 371,426N. Units of ksi.
If log KSO, calcite (CaCO3(s)) = -8.61 at 50 oC, would calcite be over- or under- saturated in a hot water heater at 50 oC if the water was in equilibrium with calcite at 25 oC (log KSO = -8.30) when it entered the house
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.
Your engineering consulting firm has been asked to determine the specific weight of an unknown material. You decide to use the concept of buoyancy to figure this out. So you weigh the material in both air and water.
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