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GIVEN: A simple way to model air pollution over a city is with a box model that assumes complete mixing and limited capability for the pollution to disperse horizontally or vertically except in the direction of the prevailing winds (for example, a town located in a valley with an inversion layer above it). Consider a town having an inversion at 250 m, a 20-km horizontal distance perpendicular to the wind, a windspeed of 2 m/s, and a carbon monoxide (CO) emission rate of 60 kg/s .Assume the CO is conservative and completely mixed in the box.
FIND: What would be the CO concentration in the box?
a block of mass m is on an inclined plane that makes angle from the horizontal plane. the coefficient of friction between the plane and the block is µ. find the point where the normal reaction N acts on the block.
The country town with service area of 150 ha is sewered, and the main outfall sewer is laid on a grade (slope) of 0.003 m/m to a treatment plant. Effluent from the treatment plant is at present discharged via an open channel to the river.
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 0.06 ft/ft. Give the radius, degree of curvature, and length of curve that yo..
Describe the equation for charging a water tank. Use: H= 2m, A_s = 1m^2, density water = 1000kg/m^3, K = 2000kg hr^-1 Mass flow in = K t. Calculate how long will it take to charge completely the tank
Two kg of oxygen at 40C are contained in a 2 m3 closed rigid tank. Assuming that oxygen behaves as an ideal gas under these conditions, what is the gas pressure in the tank in bar.
What is the relation between reflection and transmission coeffients of a sea wall
A cylinder contains 3 kg of water and water vapor mixture in equilibrium at a pressure of 500 kN/m2. If the volume of the cylinder is 1.0 m3, calculate the following: a) Temperature of the mixture b) The volume and mass of the liquid
An aluminum alloy tube with an outside diameter of 2.9 in. and a wall thickness of 0.32 in. is used as a 19-ft-long column. Assume that E = 8300 ksi and that pinned connections are used at each end of the column.
The probability is 1% that an electrical connector that is kept dry fails during the warranty period of a portable computer. If the connector is ever wet, the probability of a failure during the warranty period is 5%.
If the elevation of the pipeline at the treatment plant is 125 m, estimate the pressure in the pipeline 1 km downstream where the elevation if 110 m. Hint: Use the Colebrook equation to estimate f, and the energy equation to estimate P2 .
What is the maximum weight that can be suspended on a 16 Kg poll, 3/5 from the end. The maximum tension of the 30 degree guy-wire is 1500 N. Find the horizontal and vertical forces exerted on the poll by the hinge.
The pump curve for a given pump is represented by hp,pump=20 (1-(Q/100)^2) where hp,pump is the head provided by the pump in feet and Q is the discharge in gpm.
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