Formula Symbols - L
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L
| Symbol | Greek Symbol | Definition | English | Metric | SI | Value |
|---|---|---|---|---|---|---|
| \(L\) | - | Lagrangian function | - | - | - | - |
| \(La\) | - | Laplace number | dimensionless | - | ||
| \(Q_l\) | - | latent heat | \(\large{\frac{Btu}{lbm}}\) | \(\large{\frac{kJ}{kg}}\) | \(kJ - kg^{-1}\) | - |
| \(L\), \(\;L_s\) | latent heat of steam | - | - | - | - | |
| \(h_{fg}\) | - | latent heat of vaporization | \(\large{\frac{Btu}{lbm}}\) | \(\large{\frac{kJ}{kg}}\) | \(kJ - kg^{-1}\) | - |
| \(\delta '\) | delta | lateral deflection | \(ft\) | \(m\) | \(m\) | - |
| \(\epsilon '\), \(\epsilon_t\) | epsilon | lateral strain (transversal strain) | \(ft\) | \(m\) | \(m\) | - |
| \(v_0\) | - | launch velocity of a projectile | \(\large{\frac{ft}{sec}}\) | \(\large{\frac{m}{s}}\) | \(m - s^{-1}\) | - |
| - | - | law of conservation | - | - | - | - |
| \(L\) | - | law of conservation of angular momentum | \(\large{\frac{lbm-ft^2}{sec}}\) | \(\large{\frac{kg-m^2}{s}}\) | \(kg - m^2 - s^{-1}\) | - |
| - | - | law of conservation of energy | - | - | - | - |
| \(\overrightarrow{p}\) | law of conservation of linear momentum | \(\large{\frac{lbm-ft}{sec}}\) | \(\large{\frac{kg-m}{s}}\) | \(kg - m - s^{-1}\) | - | |
| - | - | law of conservation of mass | - | - | - | - |
| - | - | law of conservation of mechanical energy | - | - | - | - |
| - | - | law of conservation of momentum | - | - | - | - |
| - | - | law of thermodynamics | - | - | - | - |
| \(G\) | - | leak rate | - | - | - | - |
| \(a\), \(\;L\), \(\;l\) | - | length | \(ft\) or \(in\) | \(m\) or \(mm\) | \(m\) or \(mm\) | - |
| \(l_d\), \(\;\Delta l\) | delta | length differential | \(ft\) or \(in\) | \(m\) or \(mm\) | \(m\) or \(mm\) | - |
| \(L\) | - | length of crest vertical curve for stopping sight distance | \(ft\) | \(m\) | \(m\) | - |
| \(L\) | - | length of vertical curve | \(ft\) | \(m\) | \(m\) | - |
| \(\epsilon\) | epsilon | Lenz's law | - | - | - | - |
| \(\Gamma\) | Gamma | level width | - | - | - | - |
| \(Le\) | - | Lewis number | dimensionless | - | ||
| \(C_l\) | - | lift coefficient | dimensionless | - | ||
| \(L\) | - | lift force | \(lbf\) | \(N\) | \(kg - m - s^{-2}\) | - |
| \(C_L\) | - | lift number | dimensionless | - | ||
| \(c\) | - | light (vacuum) | - | - | - | - |
| \(d\) | - | lightning strike distance | \(mi\) | \(km\) | \(km\) | - |
| \(\overrightarrow{\lambda_c}\) | lambda | linear attenuation coefficient | - | - | - | - |
| \(\overrightarrow{\lambda}\) | lambda | linear concentration | dimensionless | - | ||
| \(\overrightarrow{s}\) | - | linear displacement | \(ft\) | \(m\) | \(m\) | - |
| \(\overrightarrow{\alpha_l}\) | alpha | linear expansion coefficient | \(\large{ \frac{in}{in-F} }\) | \(\large{ \frac{mm}{mm-C} }\) | \(mm - mm^{-1} - C^{-1}\) | - |
| \(\overrightarrow{f}\) | - | linear frequency | \(Hz\) | \(Hz\) | \(s^{-1}\) | - |
| \(\overrightarrow{Imp}\) | - | linear impulse | \(lbf-sec\) | \(N-s\) | \(kg-m-s^{-1}\) | - |
| \(\overrightarrow{p}\) | - | linear momentum | \(\large{\frac{lbm-ft}{sec}}\) | \(\large{\frac{kg-m}{s}}\) | \(kg - m - s^{-1}\) | - |
| \(\overrightarrow{p}\) | - | linear momentum vector | - | - | - | - |
| \(\overrightarrow{s}\) | - | linear motion | \(ft\) | \(m\) | \(m\) | - |
| \(\overrightarrow{e}\), \(\;\overrightarrow{\epsilon}\) | epsilon | linear strain | - | - | - | - |
| \(\overrightarrow{a_t}\) | - | linear tangential path | \(ft\) | \(m\) | \(m\) | - |
| \(\overrightarrow{\Delta l}\) | - | linear thermal expansion | \(\large{ \frac{in}{in-F} }\) | \(\large{ \frac{mm}{mm-C} }\) | \(mm - mm^{-1} - C^{-1}\) | - |
| \(\overrightarrow{\alpha_l}\) | alpha | linear thermal expansion coefficient | \(\large{ \frac{in}{in-F} }\) | \(\large{ \frac{mm}{mm-C} }\) | \(mm - mm^{-1} - C^{-1}\) | - |
| - | - | linear thermal restrained expansion | - | - | - | - |
| \(F_f\) | - | liquid critical pressure ratio factor | dimensionless | - | ||
| \(LI\) | - | liquid index | dimensionless | - | ||
| \(T_i\) | - | liquid inlet temperature | \(F\) | \(C\) | \(x+273.15\;K\) | - |
| \(LL\) | - | liquid limit | dimensionless | - | ||
| \(K_la\) | - | liquid mass transfer coefficient | \(\large{\frac{1}{sec}}\) | \(\large{\frac{1}{s}}\) | \(1-s^{-1}\) | - |
| \(F_l\) | - | liquid pressure recovery factor | dimensionless | - | ||
| \(T_o\) | - | liquid outlet temperature | \(F\) | \(C\) | \(x+273.15\;K\) | - |
| \(F_l\) | - | liquid pressure recovery factor | dimensionless | - | ||
| \(SG_l\), \(\;G_f\) | - | liquid specific gravity | dimensionless | - | ||
| \(c_l\) | - | liquid specific heat | \(\large{\frac{Btu}{lbm-F}}\) | \(\large{\frac{J}{kg-K}}\) | \(J - kg - K^{-1}\) | - |
| \(LL\) | - | live load | - | - | - | - |
| \(L\) | - | live load for LRFD design | - | - | - | - |
| \(\gamma_L\) | gamma | live load factor in LRFD steel design | - | - | - | - |
| \(P\) | - | load | \(lbf\) | \(N\) | \(kg - m - s^{-2}\) | - |
| \(C_F\) | - | load duration factor for wood design | - | - | - | - |
| \(LRFD\) | - | load and resistance factor design | - | - | - | - |
| \(\omega\) | omega | load per unit area | \(\large{\frac{lbf}{ft^2}}\) | \(\large{\frac{N}{m^2}}\) | \(N - m^{-2}\) | - |
| \(\omega\) | omega | load per unit length | \(\large{\frac{lbf}{ft}}\) | \(\large{\frac{N}{m}}\) | \(N - m^{-1}\) | - |
| \(w\) | - | load per unit length on a beam | \(\large{\frac{lbf}{ft}}\) | \(\large{\frac{N}{m}}\) | \(N - m^{-1}\) | - |
| \(K\) | - | loading factor | - | - | - | - |
| \(\chi\) | chi | Lockhart-Martinelli parameter | dimensionless | - | ||
| \(x\), \(\;y\) | - | location | \(in\) | \(m\) | \(m\) | - |
| \(\Lambda\) | Lambda | logarithmic decrement | - | - | - | - |
| \(LMTD\) | - | logarithmic mean temperature differential | \(\large{\frac{Btu}{lbm}}\) | \(\large{\frac{J}{kg}}\) | \(J-kg^{-1}\) | - |
| \(\delta\) | delta | longitudinal deflection | - | - | - | - |
| \(\epsilon\), \(\;\epsilon_a\) | epsilon | longitudinal strain (axial strain) | \(\large{\frac{in}{in}}\) | \(\large{\frac{mm}{mm}}\) | \(mm-mm^{-1}\) | - |
| \(\sigma_l\) | sigma | longitudinal stress | \(\large{\frac{lbf}{in^2}}\) | \(MPa\) | \(N-mm^{-2}\) | - |
| \(L\) | - | Lorentz coefficient | - | - | - | - |
| \(F\) | - | Lorentz force | \(T\) | \(T\) | \(kg-s^{-2}-A^{-1}\) | - |
| \(n_o\) | - | Loschmidt constant | \(ft^3\) | \(m^3\) | \(m^3\) | \(2.686\;7774\;(47)\;x\;10^{25}\) \(\large{m^3}\) |
| \(K\) | - | loss coefficient | dimensionless | - | ||
| \(L_n\) | - | loudness level | - | - | - | - |
| \(h\), \(\;k\), \(\;l\) | - | Love numbers | dimensionless | - | ||
| \(L\) | - | luminosity | - | - | - | - |
| \(K_{cd}\) | - | luminous efficacy | constant | - | ||
| \(S\) | - | Lundquist number | dimensionless | - | ||
| Symbol | Greek Symbol | Definition | English | Metric | Value | |
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