Historically, the use of crop residues in high-temperature combustion chambers proved problematic due to the formation of _____, a corrosive salt deposit resulting from the vaporization of potassium and chlorine present in the crops.
A. stover
B. ?slag
C. clinker
D. ?grit
Answer: C
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A ____ permits voltage to be stepped up or down.
a. resistor b. transformer c. capacitor d. battery
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Through _____, superior animals can reproduce at a rapid rate
A) cloning? B) tissue culture experiments? C) genetic engineering? D) reproductive technology
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What role does a modem play in our communications system? Do we always need a modem or similar device?
What will be an ideal response?
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Density is defined as:
A) The weight at standard conditions. B) The volume at standard conditions. C) Volume divided by weight. D) Weight divided by volume.
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