Hydrogen fuel cells power automobiles by ________
A) generating changes in gas pressures that move pistons in car engines
B) generating electricity
C) combining with equal parts of gasoline to create a fuel with extra octane
D) creating rapidly combustible hydrogen compounds
B
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Low-head hydropower involves ________ dams on ________ rivers.
A. Small; minor B. Small; major C. Large; major D. Large; minor E. Medium-sized; minor
What does it mean when an area is designated as wilderness?
A. The kinds of uses people make of the land is limited. B. Motor vehicles are only allowed for part of the year. C. People cannot use the land. D. None of these are correct.
Support or refute Weber's conceptualization of the Protestant ethnic.
What will be an ideal response?
What would fossil ages from the geologic timescale tell us about the age of this unconformity?
A. The amount of time represented by the unconformity can be approximately bracketed by the ages of the fossils above and below. B. The unconformity is older than the fossil ages in layers above the unconformity. C. The unconformity is younger than the fossil ages on the tilted bed. D. All of these choices are correct.