In a table, compare the production of these plastics: PLA, PHB, and polyethylene. Include the diff erent feedstocks and processes (synthetic chemistry or biological), the amount of energy is required, and if they are biodegradable.
What will be an ideal response?
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Which of the following is true about mastics?
a. They are mainly used for insulation finishes. b. They are rarely used in insulating systems. c. They can be used as sealants, bedding compounds, adhesives, and finishes d. They lower the vapor retardant performance of insulation jacket systems.
When installing heating cable, fasten the cable to the pipes using fiberglass tape or _____.
a. duct tape b. metal attachments c. plastic cable ties d. vinyl electrical tape
A survey of total project construction costs for a wide range of buildings (hospitals, schools, banks, nursing homes, etc.) in 2006 found that the average cost was $13,136,431. The mechanical and electrical portions of that cost were $2,511,893 and $1,585,384, respectively. If the total project cost in 2017 increases to $15,700,000, what would the mechanical portion of the total cost equal, provided the percentage (a) remained the same as in 2006, and (b) increased by 20% from the 2006 portion?
What will be an ideal response?
At its most basic, a control requires:
A) A thermostat and a motor. B) A voltage source, a path, and a load. C) A transformer, a relay, and a motor. D) A sensor, an actuator, and a linkage.