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a rainstrom lasts for 90 min at a constant intensity of 3.2 in/hr over a five acre parking lot. a detention pond is used to store all of the runoff from the parking lot and cannot be deeper than 2 ft. how many acres should the detention pond be to store the runoff from the parking lot. assume it takes 0.1 inches of rain to coat the parking lot surface, there is no inflitration from, or puddles on, the parking lot. Hint: set up a continuity expression for the pond with a variable surface area and solve for area.
A contractor has both a 3-cy and a 5-cy shovel in the equipment fleet. Select the minimum-size shovel that will excavate 400,000 bcy of common earth in a minimum of 130 working days of 8 hr each.
Often this content is measured in grams per cubic meter (g/m3). Assume that a cumulus cloud occupies a volume of one cubic kilometer, and its liquid water content is 0.210 g/m3.
Describe a dynamic programming algorithm to find an independent set of T such that the sum of numbers of nodes in the set is the largest among all possible independent sets of T.
A simple steam power plant operates at steady state with water circulating through the components with a mass flow rate of 100 kg/s. Stray heat transfer, kinetic energy and potential energy effects are negligible.
Your boss has assigned you the job of designing a rapid-mix tank for the new water treatment plant for the town of Waffle. The design flow rate is 0.050 m^3/s. The average water temperature is 8 degrees celcius.
A worker ties a rope oflength 12 m to he tower at A and exerts a constant force of 160 Non the rope. (a) Express the tension in each cable as a function oftheta knowing that the resultant of the tension in the cables andthe rope is directed downwa..
A human with a surface area of 2 m^2 and a surface temperature of 27 degrees celcius radiates into a large room (which acts as a black body), the surfaces of which are at 15 degrees celcius.
The three blocks shown move move with constant velocities. Find the velocity of each block, knowing that the relative velocity of A with respect to C is 300 mm/s upward and that the relative velocity of B with respect to A is 200 mm/s downward.
Soil material is being assessed as a possible liner for a sanitary landfill. A soil core was collected and brought to the laboratory. A 10-cm tall section of soil has 2 cm of water continuously ponded on it. The area of the core surface is 78 cm^2..
You have determined that a 0.5 ppm concentration of copper sulfate should be applied to a lake to control the growth. The lake volume is 50 ac-ft. How many pounds of copper sulfate should be dissolved in the lake
A certain fluid at 15 psia is contained in a cylinder behind a frictionless piston. The initial volume of the fluid is 300 in^3. The fluid expands to a volume of 450 in^3 while the pressure increases to 25 psia.
An open vat in a food processing plant contains 400L of water at 20 degrees C and atmospheric pressure. If the water is heated to 80 degrees C, what will be the percentage change in its volume? If the vat has a diameter of 3m
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