# Formula Symbols - G

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

## Formula Symbols

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## G

SymbolGreek SymbolDefinitionEnglishMetricSIValue
$$g$$ - g-factor - $$\large{ \frac{C}{kg} }$$ $$C- kg^{-1}$$ -
$$Ga$$ - Galileo number diensionless -
$$\gamma$$ gamma gamma ray - - - -
$$G$$ - gas - - - -
$$Z$$ - gas compressibility factor diensionless -
$$R$$ - gas constant $$\large{ \frac{lbf-ft}{lbmol-R} }$$ $$\large{ \frac{J}{kmol-K} }$$ $$J- kmol^{-1}-K^{-1}$$  $$8.31446261815324$$ $$\large{ \frac{J}{kmol-K} }$$
$$G$$ - gas density $$\large{\frac{lbm}{ft^3}}$$ $$\large{\frac{kg}{m^3}}$$ $$kg-m^{-3}$$ -
$$G_ga$$ - gas mass transfer coefficient $$\large{\frac{1}{sec}}$$ $$\large{\frac{1}{s}}$$ $$1-s^{-1}$$ -
$$p_l$$ - gas pressure loss through piping $$\large{\frac{lbf}{in^2}}$$ $$Pa$$ $$kg- m^{-1}-s^{-2}$$ -
$$G_g$$ - gas specific gravity dimensionless -
$$p_g$$ - gauge pressure $$\large{\frac{lbf}{in^2}}$$ $$Pa$$ $$kg- m^{-1}-s^{-2}$$ -
- - Gay-Lussac's law - - - -
$$R$$ - generic design quanity (force, shear, moment, etc.) for LRFD design - - - -
$$R_n$$ - generic normal capacity (force, shear, moment, etc.) for LRFD design - - - -
$$R_u$$ - generic max. quanity (force, shear, moment, etc.) from factored loads for LRFD design - - - -
$$G$$ - geometric flux $$ft^2$$ $$m^2$$ $$m^2$$ -
$$G$$ - Gibbs energy  - - - -
$$G$$ - Gibbs function - - - -
$$E$$ - glide ratio dimensionless -
$$\varphi$$ varphi golden ratio dimensionless -
$$G$$ - Gortler number dimensionless -
$$f$$ - gradient - - - -
$$Gz$$ - Graetz number dimensionless -
- - Graham's law $$\large{\frac{lbm}{mol}}$$ $$\large{\frac{kg}{mol}}$$ $$kg-mol^{-1}$$ -
$$Gr$$ - Grashof number dimensionless -
$$g$$ - gravity $$\large{\frac{ft}{sec^2}}$$ $$\large{\frac{m}{s^2}}$$ $$m-s^{-2}$$ -
$$g_c$$   gravity conversion constant $$\large{\frac{lbm-ft}{lbf-sec^2}}$$ -   -
$$J$$ - gravimetric air/fuel ratio dimensionless -
$$x$$ - gravimetric fraction dimensionless -
$$g$$ - gravitational acceleration $$\large{\frac{ft}{sec^2}}$$ $$\large{\frac{m}{s^2}}$$ $$m-s^{-2}$$ -
$$F$$, $$\;F_g$$ - gravitational force $$lbf$$ $$N$$ $$kg - m - s^{-2}$$ -
$$G$$, $$\;g_c$$ - gravitational constant $$\large{\frac{lbf-ft^2}{lbm^2}}$$  $$\large{\frac{N - m^2}{kg^2}}$$  $$N - m^2 -kg^{-2}$$ $$6.674\;30\;x\;10^{-11}$$ $$\large{\frac{N - m^2}{kg^2}}$$
$$g_c$$ - gravitational conversion constant $$\large{\frac{lbm-ft}{lbf-sec^2}}$$ -   -
$$E_g$$, $$\;PE_g$$ - gravitational potential energy $$lbf-ft$$ $$J$$ $$kg - m^2 - s^{-2}$$ -
$$u$$ - gravitational water content $$lbf-ft$$ $$J$$ $$kg - m^2 - s^{-2}$$ -
$$c_g$$ - group velocity $$\large{\frac{ft}{sec}}$$ $$\large{\frac{m}{s}}$$ $$m-s^{-1}$$ -
Symbol Greek Symbol Definition English Metric   Value

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