# Formula Symbols - G

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

## Formula Symbols - G

For other symbols see:  A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z

SymbolGreek SymbolDefinitionUSMetricValue
$$g$$ - g-factor - - -
$$Ga$$ - Galilei number diensionless dimensionless -
$$\gamma$$ gamma gamma ray - - -
$$G$$ - gas - - -
$$R$$ - gas constant constant constant $$8.314\;J\;mol^{-1}\;K^{-1}$$
$$G$$ - gas density $$lb\;/\;ft^3$$ $$kg\;/\;m^3$$ -
$$G_g$$ - gas specific gravity dimensionless dimensionless -
$$p_g$$ - gauge pressure $$lb\;/\;in^2 \;or\; psi$$ $$Pa$$ -
$$k$$ - gear speed factor - - -
$$q$$ - generalized coordinate - - -
$$p$$ - generalized momentum - - -
$$q$$ - generated heat $$Btu\;/\;min$$ $$J\;/\;kW$$ -
$$R$$ - 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 $$ft^2$$ $$m^2$$ -
$$G$$ - Gibbs energy   $$J$$ -
$$G$$ - Gibbs function - $$J$$ -
$$\varphi$$ varphi Golden ratio dimensionless dimensionless -
$$G$$ - Gortler number dimensionless dimensionless -
$$f$$ - gradient - - -
$$Gz$$ - Graetz number dimensionless dimensionless -
$$Gr$$ - Grashof number dimensionless dimensionless -
$$g$$ - gravity $$ft\;/\;sec^2$$ $$m\;/\;s^2$$ -
$$g_c$$   gravity conversion constant constant constant -
$$J$$ - gravimetric air/fuel ratio - - -
$$x$$ - gravimetric fraction - - -
$$g$$ - gravitational acceleration $$ft\;/\;sec^2$$ $$m\;/\;s^2$$ -
$$F$$, $$\;F_g$$ - gravitational force $$ft\;/\;sec^2$$ $$m\;/\;s^2$$ -
$$G$$, $$\;g_c$$ - gravitational constant constant constant $$6.674\;30\;\;x\;10^{-11}\;m^3\;kg^{-1}\;s^{-1}$$
$$g_c$$ - gravitational conversion constant constant constant -
$$E_g$$, $$\;PE_g$$ - gravitational potential energy $$ft-lbf$$ $$J$$ -
$$c_g$$ - group velocity - - -
$$\gamma$$ gamma growth rate - - -
$$\gamma$$ gamma gyromagnetic ratio - - -