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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
What difference does the tightening of bolt in the friction grip joint make to the load at first slip and the failure load.
Collars A and B are connected by a 25 in long wire and can slide freely on frictionless rods. If a 60 lb force Q is applied to B. determine tension in wire when (black) x = 9 in and b) corresponding mag of force P required to maintain equilibrium ..
Determine the flow depth, velocity and Froude number after the jump, the head loss associated with jump, the energy dissipation ratio, and the wasted power production potential due to the hydraulic jump.
The cross sectional area of each bar is A = 400 mm2 and L = 250 mm. If the cross bar is loaded with a load P = 250 kN, what are the normal stresses in the bars afterward
A rectangular channel of 20 f t width and having n = 0:017 carries flow of 800 f t^3/s. Calculate (a) critical depth (b) the minimum speci c energy (c) the speci c energy when depth of flow is 7 f t.
Determine the force required to lift the block of stone that weighs 200 lb. The rollers are frictionless and the static coefficient between all other surfaces is 0.3. Neglect the size and weight of the wedges.
Precipitation station X was inoperative for part of a month during which a storm occurred. The respective storm at the three surrounding stations A,B and C were 98,80 and 110mm
Finally, the train decelerates uniformly for another kilometer before coming to rest at station B. If the time for the whole journey is six minutes, draw the v-t graph and determine the maximum speed of the train.
A wastewater sample was diluted by turbidity free water; 5ml was diluted to 250 ml. Turbidity of the diluted sample was 2.3 NTU, what is the turbidity of the original sample
air flows through a horizontal iron tube (e=0.15m) at Q=5.7x10-2 m3/s. find the pipe diameter if the pressure drop is 3.5kPa per 30.5m of pipe. air density = 1.23kh/m3 dynamic vicosity = 1.79 x 10-5 N.s/m2)
Determine the design load for strength and serviceability limit states (short-term and long term), for a steel beam in a residential building with the following data;
a container is supported by three cables that are attached to a ceiling. Determine the weight W of the container, knowing that the tension in cable AB is 6 kN
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