Pressure
From Nordan Symposia
Revision as of 16:12, 7 January 2010 by Rdavis (talk | contribs) (Created page with 'File:lighterstill.jpgright|frame '''Pressure''' (symbol: P) is the force per unit area applied in a direction perpendicular to the surface of a...')
Pressure (symbol: P) is the force per unit area applied in a direction perpendicular to the surface of an object. Gauge pressure is the pressure relative to the local atmospheric or ambient pressure.
Definition
Pressure is an effect which occurs when a force is applied on a surface. Pressure is the amount of force acting on a unit area. The symbol of pressure is P.[1][2]
Pressure is a tensor quantity, and has SI units of pascal; 1 Pa = 1 N/m2, and has EES units of psi; 1 psi = 1 lb/in2.
Pressure is transmitted to solid boundaries or across arbitrary sections of fluid normal to these boundaries or sections at every point. It is a fundamental parameter in thermodynamics and it is conjugate to volume.[1]
