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physical property > pressure

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pressure  

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  • Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.  Gauge pressure (also spelled gage pressure) is the pressure relative to the ambient pressure. Various units are used to express pressure. Some of these derive from a unit of force divided by a unit of area; the SI unit of pressure, the pascal (Pa), for example, is one newton per square metre (N/m2); similarly, the pound-force per square inch (psi, symbol lbf/in2) is the traditional unit of pressure in the imperial and US customary systems. (Adapted from: https://en.wikipedia.org/wiki/Pressure)

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