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Discuss whether shoe A (leather) or shoe B (synthetic) is better for the environment based on the data in the table below. Is it possible to weight one aspect (air, water, land pollution or solid waste) as being more important than another? How? Why? Who makes these decisions in our society?
Table 1. Hypothetical Example of Life Cycle Environmental Impacts of Shoes per 100 pairs of shoes produced.
Shoe A (leather)Energy Use (BTU) -1Raw Material Consumption - Limited supply, some renewableWater use (gal) - 2 galAir Pollution - 4 lbsWater pollution - 2 lbs. organic chemicalsHazardous and Solid Waste - 2 lbs hazardous sludge
Shoe B (synthetic)Energy Use (BTU) - 2Raw Material Consumpt.-Large supply, non-renewableWater use(gal) - 4 galAir Pollution - 1 lb.Water pollution - 8 lbs inert organic chemicalsHazardous and Solid Waste - 2 lbs hazardous sludge, 3 lbs nonhazardous solid waste
a vertical curve with grade1= 3.6% meets the exit grade of -4.7% at PVI located at station 26.50. A vertical curve of 700 feet is propsed to provide the transition between the two grades.
A canal was constructed running parallel to a river 1500 ft away. Both fully penetrate a sand aquifer with a hydraulic conductivity of 1.2 ft/d. The area is subject to rainfall of 1.8 ft/y and evaporation of 1.3 ft/y.
shaped nozzle such that the velocity along the center line of the flow increased from 1.5 m / s to 15 m / s at a distance of 37.5 m. specify the amount of convective acceleration at the beginning and end of the range.
You plan to use a tank of total volume V= 10 m3 to remove a contaminant at concentration Cin = 1 g/m3 from a waste stream with a flow rate of Q = 1 m3/h. The reaction is first order with a rate constant k1 = 0.5 h-1.
Determine the required pumping rate. the aquifer has T= 1600 m2/day and the wells each have radius of influence of 600m.
Using the ADA code, what is the allowable minimum length of the ramp base if base if it is 2 ft high and the code is 1:12
A beam with a total length of 14m, has a 1000N load on the left end, 4m to the right (from the left end of the beam) there is a rolarr, 2m to the right of the rolar begins a 300 N/m load that goes for 4m, and the last 4m has a tapered load of 300 ..
A 10-year, 12%, $1,000 bond that pays dividends quarterly can be purchased for $900. If the bond is purchased and pays as scheduled, calculate the nominal and the effective rate of return that the purchaser receives.
Place the scientific mass on the inclined plane and string over the pulley. Using a force-measuring device, pull the string and determine the force needed to obtain static equilibrium.
A falling-head permeability test was carried out on a clay soil of diameter 10 cm and length 15 cm. In 1 hour the head in the standpipe of diameter 5 mm dropped from 68 cm to 50.2 cm. Calculate the hydraulic conductivity of this clay.
A 100-ft steel tape of cross-sectional area 0.0025 in^2, weight 2.3 lb, and standardized at 68 degrees F is 99.992 ft between end marks when supported throughout under a 12-lb pull.
To avoid shrinkage cracks in the grout, what should be the total expansion and total bleeding in term of percentage for the grout?
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