A(n) ____________________ ____________________ mechanism enhances an existing trend in a system
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The direction of a gravitational field is
A) in the same direction of gravitational attraction. B) away from the center of gravity of an object. C) opposite to the direction of gravitational attraction.
In developing countries, a major characteristic of efforts to curb population growth that has been the most successful includes ________
A) improved health care for all employed workers B) increased education for women C) increased education for men D) better health care for infants E) knowledge of birth control
In what period did average satisfaction levels in the U.S. peak?
A) 1920s ("Roaring Twenties") B) 1950s (era of "Leave It To Beaver") C) 1960s (Vietnam era) D) 1980s (Reagan era) E) U.S. satisfaction levels are at their highest peak now.
Density is an important property of ocean water because ________
A) it determines the temperature of the water B) it determines the horizontal position of the water C) it only changes when there is a major change in water chemistry D) it determines the chemistry of the water E) it determines the vertical position of the water