Hydrostatic equilibrium occurs when:
A) the force of gravity and the vertical pressure gradient both act to push air upward.
B) the force of gravity and the vertical pressure gradient both act to push air downward.
C) the force of gravity and the vertical pressure gradient have equal value and oppose each other.
D) large air masses are moving either up or down.
Answer: C
You might also like to view...
Which principle suggests that all of Earth's geological features and history can be explained by processes identical to
ones acting today? a. Catastrophism b. Natural selection c. Uniformitarianism d. Tectonic e. Evolution
Relate glacial budget to two zones of a glacier
What will be an ideal response?
What are some of the alternative, unconventional resources for oil and natural gas?
What will be an ideal response?
Compared to the five-year period 1971-1975, approximately how much warmer has the Earth's temperature become during the more recent 2001-2005 five-year period?
A) 5.2°F B) 3.0°F C) 4.0°F D) 0.92°F E) 1.5°F