Graphene, one of the world's strongest-yet thinnest, light, flexible, and stretchable-materials, is composed of ____.
A. iron
B. titanium
C. carbon
D. silver
E. silicon
Answer: C
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Toxicologists refer to the total amount of a chemical present in the tissues of an organism as ________
A) toxic content B) threshold content C) biomagnification D) bioaccumulation E) body burden
A sports car that maintains a constant velocity of 120 km/h for one-half hour has an acceleration of
A. 120 km/h. B. 240 km/h. C. 60 km/h. D. zero because of no change in velocity.
On this map of southeastern Asia and adjacent areas, which site would have earthquakes along a subduction zone?
A) 1, in the Indian Ocean
B) 2, in Tibet
C) 3, near Japan
D) 4, near the Tonga island arc
E) 3 and 4
The greatest future growth in human numbers is expected to occur in the
A. developing nations. B. rich countries of Europe and North America. C. rich Asian countries including Japan.