The least effective way to deal with air pollution is to
A) make smoke stacks higher.
B) add filters to polluting stacks.
C) limit the amount of pollution in a particular location.
D) All of these
Answer: D
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A ball is tossed straight upward at 40 m/s with no air resistance. Six seconds later its speed is
A. zero. B. 10 m/s. C. 20 m/s. D. 30 m/s
Approximately what percentage of the electricity produced in the United States comes from nuclear energy?
A) 5% B) 15% C) 35% D) 55%
Which of the following is a consequence of clearing forests for agriculture purposes?
A) Soil erosion is increased. B) Biodiversity is increased. C) Crop productivity is greatly increased because of the rich soil. D) Water runoff is decreased. E) CO2 levels remain appropriate within the atmosphere.
Which of these South Asian cultures is the oldest?
A) Harappan B) Mughal C) Aryan D) Vedic E) Parsee