The major ions of seawater are those which ________.
A. have residence times that are short relative to the mixing time of the oceans
B. are used by living organisms to build their soft tissues
C. do not vary from place to place in the oceans, except as salinity varies
D. None of these is correct
E. All of these are correct
Answer: C
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A toy is pulled by three kids. Jim pulls with a force of 30 N north, Jill pulls with a force of 30 N south, and Jay pulls with a force of 15 N east. The acceleration of the toy is
A. 15 m/s2. B. 10 m/s2. C. 33 m/s2. D. need more information
In economic terms, "supply" is how much of something
A. People will buy at current prices B. Is available on the market C. People want D. People need E. People will buy regardless of price
Urban areas in the United States are divided into census tracts that contain approximately 50,000 residents and correspond, where possible, to neighborhood boundaries
Indicate whether the statement is true or false.
The increase in financial cost of damages from the Northridge earthquake, as compared to the San Fernando earthquake can be attributed to:
a. inflation b. the much higher magnitude of the Northridge earthquake c. the location of the epicenter of the Northridge earthquake in a more vulnerable area d. an increase in population and development in the area during the time between the two earthquakes