Pressure
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Definition:

Pressure is an effect which occurs when a Force is applied on a surface.The symbol of Pressure is p which can also be written as P .

Formula:

Mathematically:

p = \frac{F}{A}\ \mbox{or}\ p = \frac{dF}{dA}

where:

p is the pressure,
F is the normal force,
A is the area.

Pressure is a scalar quantity, and has SI units of pascals; 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.


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