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air pressure

the force exerted by air, whether compressed or unconfined, on any surface in contact with it.
Origin of air pressure
1870-75 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for air pressure
  • Many of their students lack a fundamental understanding of how air pressure works.
  • The turbine turns because the air pressure on one side of the blade is higher than the other side.
  • Warm, moist air over tropical or subtropical seas rises, causing a zone of lower air pressure beneath it.
  • It can be redesigned for high performance by simply increasing the air pressure and the outlet valve size.
  • There was also concern about differences in air pressure zones causing it to flip or veer suddenly.
  • Stars twinkle due to random variations in air pressure.
  • Blowing into the bottle raises the air pressure again.
  • Any slight change in wind speed or air pressure can result in a failure to launch.
  • Elicit from students that the instrument measures air pressure.
  • Because of the low air pressure, the body overcompensates and speeds up its blood circulation.

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