Formula Symbols - E

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

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 SymbolDefinitionUSMetric
\(g\) - earth (mean) \(ft\;/\;sec^2\) \(m\;/\;s^2\)
\(e\) - eccentricity in mm
\(Ec\) - Eckert number dimensionless number dimensionless number
\(I\) - effective line current \(A\) \(A\)
\(V\) - effective line voltage \(V\) \(V\)
\(m*_n \;,\; m*_p\) - effective mass - -
\(E \;,\; \xi\) xi effectiveness - -
\(\eta \) eta efficiency \(percent\) \(percent\)
\(\Theta_e\) Theta Einstein temperature - -
\(E\) - elastic - -
\(S\) - elastic section modulus - -
\(E\) - elasticity - -
\(\lambda\) lambda elastic modulus \(lbf\;/\;ft^2\) \(Pa\)
\(El\) - elasticity number dimensionless number dimensionless number
\(q\) - electric charge - -
\(F\) - electric capacitance \(C \;/\; V\) \(C \;/\; V\)
\(S\) - electric conductance \(A \;/\; V\) \(A \;/\; V\)
\(\rho_{ik}\) rho electric conductivity tensor - -
\(I\) - electric current - -
\(J \;,\; j\) - electric current density - -
\(p\) - electric dipole moment - -
\(D\) - electric displacement - -
\(E\) - electric field - -
\(\psi\) psi electric flux - -
\(V \;,\; \phi\) phi electric potential \(W \;/\; A\) \(W \;/\; A\)
\(\Omega\) Omega electric resistance \(V \;/\; A\) \(V \;/\; A\)
\(X_c\) - electric susceptibility - -
\(\sigma\) sigma electrical conductivity - -
\(R_e\) - electrical resistance \(\Omega\) \(\Omega\)
\(\rho \) rho electrical resistivity \(\Omega^{-in}\) \(\Omega^{-cm}\)
\(e\) - electron - -
\(E_{ea}\) - electron affinity - -
\(\frac {m_c}{m_{\alpha}}\)   electron-\(\alpha\)  particle mass ratio - -
\(w_{ce}\) - electron cyclotron circular frequency - -
\(\frac {m_e}{m_d}\) - electron-deuteron mass ratio - -
\(D_e\) - electron diffusion coefficient - -
\(m_c\) - electron mass - -
\(M \left( e \right) \;,\; M_e\) - electron molar mass - -
\(\frac {m_c}{m_{\mu}}\) mu electron-muon mass ratio - -
\(n_c\) - electron number density - -
\(w_{pe}\) - electron plasma circular frequency - -
\(\frac {m_c}{m_p}\)   electron-proton mass ratio - -
\(\frac {-e}{m_e}\)   electron specific charge - -
\(T_e\) - electron temperature - -
\(e\) - electronic charge - -
\(u \;,\; w\) - electromagnetic energy density - -
\(E \;,\; \varepsilon\) varepsilon electromotive force (EMF) - -
\(F_e \) - electrostatic force - -
\(dl \;,\; ds\) - element of path - -
\(e \;,\; \frac {e}{h}\) - elementary change - -
\(y\) - elevation \(ft\) \(m\)
\(y_i\) - elevation at inlet \(ft\) \(m\)
\(y_o\)  - elevation at outlet \(ft\) \(m\)
\(\Delta y\) Delta elevation differential \(ft\) \(m\)
\(\epsilon\) epsilon emissivity - -
\(E\) - emissive power \(Btu \;/\; hr-ft^2\) \(W \;/\; m^2\)
\(\gamma\) gamma empirical constant \(1/^\circ F\) \(1\;/\;K\)
\(r\) - empirical rate - -
 \(E \;,\; W\) - energy in-lbf J
\(EER\) - energy efficiency ratio \(Btu \;/\; W-hr\) -
\(\epsilon\) epsilon energy of particle - -
\(E_g\) - energy gap - -
\(H\) - enthalpy \(Btu\;/\;lbm\) \(kJ\;/\;kg\)
\(S\) - entropy \(Btu\;/\;lbm-^\circ R\) \(kJ\;/\;kg\cdot K\)
\(\Delta S\) Delta entropy differential \(Btu\;/\;lbm-^\circ R\) \(kJ\;/\;kg\cdot K\)
\(\phi\) phi entropy function \(Btu\;/\;lbm ^\circ R\) \(kJ\;/\;kg \cdot K\)
\(K\) - equilibrium constant - -
\(EW\) - equivalent weight \(lbm\;/\;lbmol\) \(kg\;/\;kmol\)
\(n \;,\; n_n \;,\; n^{12}\) - electron number density - -
\(\gamma\) gamma empirical constant \(1 \;/\; ^\circ F\) \(1 \;/\; K\)
\(r\) - empirical rate constant \(1 \;/\; hr\) \(1 \;/\; s\)
\(Er\) - Ericksen number dimensionless number dimensionless number
\(v_e\) - escape velocity \(ft\;/\;sec\) \(m\;/\;s\)
\(A_e \;,\; P_e\) - Ettinghausen coefficient - -
\(Eu\) - Euler number dimensionless number dimensionless number
\(J\) - exchange integral  - -
\(Y\) - expansion factor - -
\(e\) - exponential constant - -