Engineering, 17.10.2020 14:01, barstr9146
Assignment directions
Read “Cradle to Grave: Case Studies of Buildings’ Environmental Footprint” and answer the following questions. Add a one-paragraph introduction when you’re done answering the questions.
Assignment guidelines
Your introduction should explain the concept of a life-cycle assessment and define any terms you deem necessary. Then copy the following questions into your paper and answer them in complete sentences and/or paragraphs.
In your own words, explain the concept of the “U. S. average electricity mix.”
Describe the purpose of eQUEST, and provide a link to it.
During a building’s long maintenance phase, what building materials are likely to be discarded, and how?
Provide a link to the online Athena Impact Estimator that is used to calculate the steel building demolition energy, and describe briefly how it works.
Looking at Figure 2, discuss the environmental impact of each life-cycle phase of a building (manufacturing, construction, operation, maintenance, and end-of-life); for example, which phase consumes the most fossil fuels? Which has the most global warming potential? Provide a summarizing statement.
Analyzing the data in Figure 3, discuss the environmental impact of each building system (foundations, walls, beams and columns, floors, and roofs); for example, which system consumes the most fossil fuels? Which system has the most potential for acid rain? Provide a summarizing statement.
Explain the concept of the environmental footprint in the study’s title as it relates to the study’s results.
Submission requirements
Submit your report electronically. Include your introductory paragraph, and list both questions and answers. Grammar, spelling, and punctuation count.
Answers: 3
Engineering, 04.07.2019 18:10, ashleybaber4966
If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79
Answers: 1
Engineering, 04.07.2019 18:10, tjeffers90028
Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.
Answers: 1
Engineering, 04.07.2019 18:10, skpdancer1605
Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2
Answers: 3
Engineering, 04.07.2019 18:10, soreese02
An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature
Answers: 2
Assignment directions
Read “Cradle to Grave: Case Studies of Buildings’ Environmental Footprint” an...
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