An object set in motion tends to remain in motion
A. without the need of a force.
B. only with an applied external force.
C. as described by Aristotle.
D. due to a force within the object.
Answer: A
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Most people are homeless because they
A) cannot afford housing and lack a regular source of income, perhaps because of job loss, mental illness, or family problems. B) cannot afford medicine and lack a middle-class source of income, usually because of mental illness, pregnancy, and family problems. C) fail to achieve the level of "survival of the fittest" as prescribed by social Darwinism. D) cannot afford a college education, which is required in order to obtain and maintain a steady job in the United States. E) are lazy or lack the kind of work ethic that wealthy people have.
Which of the following is found just above cumulus humilis clouds?
A. a conditionally unstable layer B. a stable layer C. an unstable layer D. unusually strong horizontal winds
Persistent drought is often associated with
A) a series of strong cyclones. B) persistent zonal patterns in upper-level air flows. C) the occurrence of moving meridional patterns in upper-level winds. D) the coast of British Columbia.
How many sticky ends are produced if a certain restriction endonuclease cleaves a plasmid at three different locations?
A) 3 B) 6 C) 8 D) 9