For some plastics and composites, the internal stresses of production may be reduced or eliminated by____, which consists of prolonged heating of the plastics part at a temperature lower than the molding temperature.?
A. ?burnishing
B. ?milling
C. ?annealing
D. ?flame polishing
Answer: C
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Which of the following is the formula for calculating the surface area of a rectangle?
a. A = W ? H b. ?R2 c. a2 + b2 = c2 d. none of the above
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The ability to transform AC to a higher or lower __________ using a transformer is a significant advantage of AC.
Fill in the blank(s) with the appropriate word(s).
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Natural gas plants and ____________________ each produce about one-fifth (20%) of the nation’s power.
Fill in the blank(s) with the appropriate word(s).
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How is photoperiod regulated in a commercial greenhouse?
What will be an ideal response?
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