Formula Symbols - P

Written by Jerry Ratzlaff. Posted in Nomenclature & Symbols for Engineering, Mathematics, and Science

SymbolGreek SymbolDefinitionUSMetric
\( Pe\) - Peclet number Dimensionless Number Dimensionless Number
\(P\) - perimeter \(ft\) \(m\)
\(PF\) - performance factor - -
\(\epsilon \) epsilon permittivity - \(F/m\)
\(\gamma \) gamma photon - -
\(\pi\) pi Pi Dimensionless Number Dimensionless Number
\(Pl\) - Planck's Constant - \(J\cdot s\)
\(Po\) - Polsson's Ratio - -
\(\upsilon \) upsilon Poisson's Ratio - -
\(n\) - polytropic exponent - -
\(J\) - polar moment of inertia \(in^4\) \(m^4\)
\(P\) - porosity - -
\(\Delta x\) - position differential - -
\(x_d\) - position differential - -
\(PE\) - potential energy - -
\( P\) - power \(ft-lbf/sec\) \(watt\)
\( pf\) - power factor Dimensionless Number Dimensionless Number
\( N_p\) - Power number Dimensionless Number Dimensionless Number
\( PTR\) - power-to-heat ratio - -
\(Pr\) - Prandtl number Dimensionless Number Dimensionless Number
\( p\) - pressure \(lbf/ft^2\) \(Pa\)
\(C_p\) - pressure coefficient Dimensionless Number Dimensionless Number
\(\Delta p\) - pressure differential \(lbf/ft^2\) \(Pa\)
\(p_d\) - pressure differential \(lbf/ft^2\) \(Pa\)
\(p\) - proton - -
\(\eta\) eta pulley efficiency - -
\(\epsilon\) epsilon pulley loss factor - -