Surface coal mining involves removal of material covering coal that is close to the surface. This covering material is called ____
a. cap rocks c. overburden
b. coal seams d. over rocks
C
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Explain why most homeowners prefer a grid-connected system to a stand alone system.
What will be an ideal response?
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The smallest size locking and grounding type receptacle that may be used to provide shore power for boats is _____.
a. 15A b. 20A c. 25A d. 30A
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Chickens can run as fast as _____ miles per hour
a. 9 b. 12 c. 16 d. 23
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Are soluble salts compounds of sodium, calcium, and magnesium that dissolve in water?
Indicate by YES (Y) or NO (N).
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