Multiple choice

Which of the following is generally balanced by a nearly equal but opposite gravitational force, so that strong upward winds are not experienced?

  1. The vertical pressure gradient force

  2. The horizontal pressure gradient

  3. The gravity in the surface air

  4. All of the above

  5. None of the above
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A Correct answer
Explanation

This is the correct answer. The vertical pressure gradient force is generally balanced by a nearly equal but opposite gravitational force, so that we do not experience strong upward winds.

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