Negative pressure
Encyclopedia
Negative pressure may refer to:
- negative pressure as opposed to positive pressure
- stretched liquid
- vacuumVacuumIn everyday usage, vacuum is a volume of space that is essentially empty of matter, such that its gaseous pressure is much less than atmospheric pressure. The word comes from the Latin term for "empty". A perfect vacuum would be one with no particles in it at all, which is impossible to achieve in...
- negative gauge pressure, a way of expressing pressure measurementPressure measurementMany techniques have been developed for the measurement of pressure and vacuum. Instruments used to measure pressure are called pressure gauges or vacuum gauges....
s below atmospheric pressure - suctionSuctionSuction is the flow of a fluid into a partial vacuum, or region of low pressure. The pressure gradient between this region and the ambient pressure will propel matter toward the low pressure area. Suction is popularly thought of as an attractive effect, which is incorrect since vacuums do not...
- transpirational pull