Machine-translated by Google. Questions are authored in English.
Top

Discussion

Which quantity is geopotential?

  • A.The work done against gravity in raising unit mass from sea level
  • B.The pressure exerted by the column of air lying above the level being considered at that particular moment
  • C.The temperature of the column
  • D.The height of a level above mean sea level as measured directly by an instrument carried on a balloon

Answer: A

Geopotential is the potential energy per unit mass relative to sea level, and dividing it by a standard gravity gives geopotential height. Using it absorbs the variation of gravity with latitude and altitude into the coordinate, so that a given geopotential height corresponds to the same energy everywhere. Pressure and temperature are different variables entirely. Framing the question as which quantity the change acts upon makes the answer follow without calculation.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.