What is hydrostatic equilibrium, how is it affected by density, and what are its implications for air movement?
What will be an ideal response?
Answer: Hydrostatic equilibrium: When the gravitational force exactly equals the vertical pressure gradient force in magnitude, no vertical acceleration occurs. When the gravitational force slightly exceeds the vertical pressure gradient force, downward motions result. Such downward motions are always very slow. On the other hand, the upward-directed pressure gradient force sometimes greatly exceeds the gravitational force, and updrafts in excess of 160 km/hr (100 mph) can develop. Such updrafts are associated with powerful thunderstorms.
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What will be an ideal response?
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What will be an ideal response?
The world's potentially farmable land is estimated to be about ________ the present cultivated area
A) twice B) four times C) eight times D) sixteen times E) thirty-two times
What is the new system of spelling Chinese words and names using the Latin alphabet of 26 letters called?
A) Wade-Giles system B) Feng Shui system C) Pinyin system D) Falun Gong system E) none of the above