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The Rappahannock River near Warrenton, VA has a flow rate of 3.00 cms. Tin Pot Run (a pristine stream) discharges into the Rappahannock at a flow rate of 0.05 cms. To study mixing of the stream and river, a conservative tracer is to be added to Tin Pot Run. If the instruments that measure the tracer can detect a concentration of 1.0 mg/L, what minimum concentration must be achieved in Tin Pot Run so that 1.0 mg/L of tracer is to be measured after complete mixing of the stream and Rappahannock has been achieved and that no tracer is in Tin Pot Run or the Rappahannock above the point where the two streams mix. What mass rate (in kg/day) of tracer must be added to Tin Pot Run?
The business it to make dinner ware for various markets this will include plastic utensils (forks, knives, spoon, etc) as well as low end flat ware suitable for institutions such as high school college cafeterias.
At the end of year 1 the piece of equipment is worth $15,000 and at the end of year 2 $13,000, and at the end of the third and final year the salvage value is equal to $9,000.Applying the straight line depreciation, calculate the depreciation expe..
Plot the stress-strain curve and determine the proportional limit, modulus of elasticity (i.e., the slope of the initial part of the stress-strain curve), and yield stress at 0.2% offset. Is the material ductile or brittle
A cutting 9 m deep is to be excavated in saturated clay of unit weight 19 kN/m3. The design shear strength parameters are cu = 30 kN/ m2 and fu = 0. A hard stratum underlies the clay at a depth of 11 m below ground level.
A lab experiment of permeability test was carried out on a cylindrical sample of sand 3 inch in diameter and 4 inch in height. 9 in3 of water was collected in 2 minutes, under a head (water level difference) of 11 inch. Compute the permeability in..
consider a spacecraft that is positioned directly between the earth and moon.the mass of the moon's is approximately 7.35 X10^22 kg, and at the instant under consideration, the moon is 3.8 X 10^8 km from earth.
Given a sand with a moisture content of 10%, how much water needs to be added to bring the sand to a moisture content of 20%
Calculate the ozone column amount in DU, corresponding to the pressure profile and ozone concentrations given above. Recall Avogadro's number, NA = 6.0 × 1023 molecules per mole, from which one can calculate [O3]= ..
determine the stations and elevations of the PVCs, PVIs and PVTs of the two vertical curves required to connect the highway segments, as well as the length of the constant grade section (connecting grade is to be small as possible).
If a mass of 500kg is placed centrally on the top face of the buoy, find the maximum height of its centre of gravity above the bottom of the buoy so that the buoy may remain in stable equilibrium.
(1) a constant wind velocity that is twice the mean wind velocity and operating half the time; and (2) a constant wind velocity that is three times the mean wind velocity operating one-third of the time.
What is the dry unit weight, the saturated unit weight, and the buoyant unit weight, of a soil having a void ratio of 0.5 and a value of Gs of 2.7
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