Double the frequency of sound and you also double its
A. amplitude.
B. wavelength.
C. speed.
D. none of the above
Answer: D
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Which statement is true with regard to thermohaline circulation?
A) Thermohaline circulation is caused by even and steady global heating of the ocean. B) Thermohaline circulation is the result of heating of the ocean at high latitudes and cooling at low latitudes. C) Thermohaline circulation is driven by density gradients. D) Thermohaline circulation is primarily driven by wind.
Devastating earthquakes struck Haiti in January 2010, forcing the native people to live under the most primitive of conditions
Which one of the following forms of immediate aid would most likely prevent the outbreak of cholera and dysentery in refugees who were not seriously harmed by the earthquakes? A) A large supply of clothing, dish soap, and toiletries B) Large supplies of rice and pots to cook the rice C) Water purification systems and supplies of bottled water D) Tents and blankets to help the people get protect themselves from the sun and keep warm at night
Economically disadvantaged people interested in starting a small business in a developing country are most helped by
A) insurance brokers who reassure the bank that the new business does not pose a credit risk. B) banks that provide large loans that permit the new business to establish a solid foundation. C) the involvement of women in the new business due to their reputation as good workers. D) the availability of microloans from a new kind of bank.
The Amazon has the greatest discharge in the world. Which river has the second greatest discharge?
A) The Missouri B) The Congo C) The Ob D) The Nile E) The Hudson