pressure per unit area
21Pascal (pressure) — The pascal (symbol: Pa) is the SI derived unit of pressure, stress, Young s modulus and tensile strength. It is a measure of perpendicular force per unit area i.e. equivalent to one newton per square meter or one joule per cubic metre. In… …
22Disjoining pressure — (symbol Πd), in surface chemistry, according to an IUPAC definition[1], arises from an attractive interaction between two surfaces. For two flat and parallel surfaces, the value of the disjoining pressure (i.e., the force per unit area) can be… …
23Atmospheric pressure — Air pressure redirects here. For the pressure of air in other systems, see pressure. Atmospheric pressure is the force per unit area exerted against a surface by the weight of air above that surface in the Earth s atmosphere. In most… …
24Blood pressure — For information about high blood pressure, see Hypertension. Blood pressure Diagnostics A sphygmomanometer, a device used for measuring arterial pressure. MeSH …
25Solar radiation pressure — In astronomy, Solar radiation pressure is the force exerted by solar radiation on objects within its reach. Solar radiation pressure is of interest in astrodynamics, as it is one source of the orbital perturbations.The disturbance force can be… …
26blood pressure — noun the pressure of the circulating blood against the walls of the blood vessels; results from the systole of the left ventricle of the heart; sometimes measured for a quick evaluation of a person s health (Freq. 2) adult blood pressure is… …
27radiation pressure — noun the minute pressure exerted on a surface normal to the direction of propagation of a wave • Syn: ↑corpuscular radiation pressure • Hypernyms: ↑pressure, ↑pressure level, ↑force per unit area • Hyponyms: ↑ac …
28vapour pressure — noun the pressure exerted by a vapor; often understood to mean saturated vapor pressure (the vapor pressure of a vapor in contact with its liquid form) • Syn: ↑vapor pressure • Hypernyms: ↑pressure, ↑pressure level, ↑force per unit area * * *… …
29gas pressure — noun the pressure exerted by a gas • Hypernyms: ↑pressure, ↑pressure level, ↑force per unit area • Hyponyms: ↑atmospheric pressure, ↑air pressure, ↑pressure …
30instantaneous sound pressure — noun the difference between the instantaneous pressure at a point in a sound field and the average pressure at that point • Syn: ↑sound pressure • Hypernyms: ↑pressure, ↑pressure level, ↑force per unit area * * * Physics. See sound pressure ( …
