relative vapour pressure

См. также в других словарях:

• Vapour Pressure Deficit — Vapour Pressure Deficit, or VPD , is the difference (deficit) between the amount of moisture in the air and how much moisture the air can hold when it is saturated. Once air becomes saturated water will condense out to form clouds, dew or films… …   Wikipedia

• Pressure measurement — The construction of a bourdon tube gauge, construction elements are made of brass Many techniques have been developed for the measurement of pressure and vacuum. Instruments used to measure pressure are called pressure gauges or vacuum gauges. A… …   Wikipedia

• vapour — n. & v. (US vapor) n. 1 moisture or another substance diffused or suspended in air, e.g. mist or smoke. 2 Physics a gaseous form of a normally liquid or solid substance (cf. GAS). 3 a medicinal agent for inhaling. 4 (in pl.) archaic a state of… …   Useful english dictionary

• relative humidity — the amount of water vapor in the air, expressed as a percentage of the maximum amount that the air could hold at the given temperature; the ratio of the actual water vapor pressure to the saturation vapor pressure. Abbr.: RH, rh Also called… …   Universalium

• Relative humidity — is a measurement of the amount of water vapor that exists in a gaseous mixture of air and water. Estimating relative humidity The relative humidity of an air water vapor mixture can be estimated if both the temperature ( T ) and the dew point… …   Wikipedia

• vapour density — noun the density of a gas relative to the density of hydrogen • Syn: ↑vapor density • Hypernyms: ↑relative density * * * vapour density noun The density of a gas or vapour relative to that of hydrogen at the same temperature and pressure • • •… …   Useful english dictionary

• vapour trail — ▪ aerology also called  Condensation Trail, or Contrail,         streamer of cloud sometimes observed behind an airplane flying in clear, cold, humid air. It forms upon condensation of the water vapour produced by the combustion of fuel in the… …   Universalium

• vapour density — noun Chemistry the density of a particular gas or vapour relative to that of hydrogen at the same pressure and temperature …   English new terms dictionary

• relative humidity —   ratio of water vapour in the air compared to the maximum possible at that temperature and pressure, expressed as a percentage …   Geography glossary

• Orders of magnitude (pressure) — This is a tabulated listing of the orders of magnitude in relation to pressure expressed in pascals. Magnitude Pressure lbf/in2 or dB Item 10−13 Pa 0.1 pPa Interstellar space pressure (approximate) 10 …   Wikipedia

• Vapor pressure — (also known as equilibrium vapor pressure or saturation vapor pressure ), is the pressure of a vapor in equilibrium with its non vapor phases. All liquids and solids have a tendency to evaporate to a gaseous form, and all gases have a tendency to …   Wikipedia