Formula Symbols - M

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

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M

SymbolGreek SymbolDefinitionEnglishMetricSIValue
\(Ma\) - Mach number dimensionless  -
\(Mi\) - Machinability index dimensionless -
\(\Sigma\) Sigma macroscopic cross section - - -  -
\(M\), \(\;m_i\) - magnetic - - -  -
\(\mu_o\) mu magnetic constant \(\large{\frac{H}{ft}}\) \(\large{\frac{H}{m}}\)  \(H-m^{-1}\) \(1.2566\;x\;10^{-6}\) \(\large{\frac{H}{m}}\)
\(n_m\), \(\;\nu_m\) nu magnetic diffusivity \(\large{\frac{ft^2}{sec}}\) \(\large{\frac{m^2}{s}}\) \(m^2-s^{-1}\)  -
\(m\), \(\;\mu\) mu magnetic dipole moment - - -  -
\(B\) - magnetic field \(T\) \(T\) \(kg-s^{-2}-A^{-1}\)  -
\(H\), \(\;\vec{H}\) - magnetic field strength \(\large{\frac{A}{ft}}\) \(\large{\frac{A}{m}}\) \(A-m^{-1}\) -
\(\phi_B\), \(\;\phi_m\) phi magnetic flux \(\large{\frac{Wb}{in^2}}\) \(\large{\frac{Wb}{mm^2}}\) \(Wb-mm^{-2}\)  -
\(B\) - magnetic flux density \(\large{\frac{Wb}{ft^2}}\) \(\large{\frac{Wb}{m^2}}\) \(Wb-m^{-2}\)  -
\(\Phi_o\) Phi magnetic flux quantum \(\large{\frac{V}{sec}}\) \(Wb\) \(kg-m^2-s^{-2}-A^{-1}\) \(2.067\;833\;758\;x\;10^{-15}\) \(Wb\)
\(F_m\) - magnetic force \(\large{\frac{lbm-ft}{sec^2}}\) \(N\) \(kg-m-s^{-2}\)  -
\(F_m\) - magnetic force between parallel conductors \(\large{\frac{lbm-ft}{sec^2}}\) \(N\) \(kg-m-s^{-2}\) -
\(B\), \(\;\vec{B}\) - magnetic induction \(T\) \(T\) \(kg-s^{-2}-A^{-1}\)  -
\(\mu\) mu magnetic moment of a particle - - -  -
\(\mu\) mu magnetic permeability \(\large{\frac{H}{ft}}\) \(\large{\frac{H}{m}}\) \(H-m^{-1}\)  -
\(\mu_0\) mu magnetic permeability vacuum - \(\large{\frac{N}{A^2}}\) \(N-A^{-2}\) \(1.256\;637\;0614\;x\;10^{-6}\) \(\large{\frac{N}{A^2}}\)
\(U_m\) - magnetic potential difference - - -  -
\(p_m\) - magnetic pressure \(\large{\frac{lbm}{ft-sec^2}}\) \(Pa\) \(kg-m^{-1}-s^{-2}\)  -
\(\beta\) beta magnetic pressure ratio dimensionless  -
\(R_m\) - Magnetic Reynolds number dimensionless  -
\(X\) - magnetic susceptibility - - -  -
\(A\) - magnetic vector potential - - -  -
\(F_m\) - magnetomotive force - - -  -
\(M\) - magnetization - - -  -
\(M\) - magnification - - -  -
\(MF\)   magnification factor - - -  -
\(h_{l-major}\) - major head loss \(ft\) \(m\) \(m\)  -
\(v\) - Manning equation - - -  -
\(n\) - Manning friction coefficient - - -  -
\(n\) - Manning's roughness coefficient dimensionless  -
\(Ma\) - Marangoni number dimensionless  -
\(MS\), \(MOS\) - margin of safety dimensionless -
\(M\) - Markstein number dimensionless  -
\(m\) - mass \(lbm\) \(kg\) \(kg\)  -
\(M\) - mass scale - - - -
\(\mu_m\) mu mass attenuation coefficient - - -  -
\(\dot {m}_c\) - mass condensation rate - - -  -
\(c\) - mass consentration \(lbm\) \(kg\) \(kg\)  -
\(\rho \) rho mass density \(\large{\frac{lbm}{ft^3}}\) \(\large{\frac{kg}{m^3}}\) \(kg-m^{-3}\)   -
\(D\), \(\;D_m\) - mass diffusivity \(\large{\frac{ft^3}{sec}}\) \(\large{\frac{m^3}{s}}\)  \(m^3-s^{-1}\)  -
\(\Delta\) Delta mass excess - - -  -
\(\dot {m}_f\) - mass flow rate \(\large{\frac{lbm}{sec}}\) \(\large{\frac{kg}{s}}\) \(kg-s^{-1}\)  -
\(B\), \(\;\Gamma\) Gamma mass flow rate per unit area \(\large{\frac{lbm}{ft^2-sec}}\) \(\large{\frac{kg}{m^2-s}}\) \(kg-m^{-2}-s^{-1}\)  -
\(w\) - mass fraction - - -  -
\(m\), \(\;\dot {m}\) - mass leak rate \(\large{\frac{lbm}{sec}}\) \(\large{\frac{kg}{s}}\) \(kg-s^{-1}\)  -
\(M\), \(\;\vec{M}\) - mass magnetization \(\large{\frac{A-ft^2}{lbm}}\) \(\large{\frac{A-m^2}{kg}}\) \(A-m^2-kg^{-1}\) -
\(I\) - mass moments of inertia \(lbm-ft^2\) \(kg-m^2\) \(kg-m^2\)   -
\(A\) - mass number - - -  -
\(m_l\) - mass of liquid \(lbm\) \(kg\) \(kg\) -
\(\mu\) mu mass of molecule \(\large{\frac{oz}{mol}}\) \(\large{\frac{g}{mol}}\) \(g-mol^{-1}\)   -
\(m_s\) - mass of solid \(lbm\) \(kg\) \(kg\) -
\(M\) - mass of the earth \(lbm\) \(kg\) \(kg\) -
\(K\), \(\;k\) - mass transfer coefficient dimensionless  -
\(\dot {m}_t\) - mass transfer rate \(\large{\frac{lbm}{sec}}\) \(\large{\frac{kg}{s}}\) \(kg-s^{-1}\)  -
\(G\) - mass velocity - - -  -
\(J\) - Massieu function - - -  -
\(D\) - material density \(\large{\frac{lbm}{ft^3}}\) \(\large{\frac{kg}{m^3}}\) \(kg-m^{-3}\)  -
\(K_{cE}\) - material factor for wood column design - - -  -
\(S_f\) - maximum allowable stress \(\large{\frac{lbf}{in^2}}\) \(MPa\) \(N-mm^{-2}\)  -
\(S\) - maximum allowable tensile stress \(\large{\frac{lbf}{in^2}}\) \(MPa\) \(N-mm^{-2}\)  -
\(M\) - maximum bending moment \(lbf-in\) \(N-mm\) \(N-mm\)   -
\(\Delta_{max}\) Delta maximum calculated beam deflection \(in\) \(mm\) \(mm\)  -
\(h_{max}\) - maximum height of a projectile \(ft\) \(m\) \(m\) -
\(P_{max}\)   maximum load - - - -
\(M_u\) - maximum moment from factored loads for LRFD beam design \(lbf-ft\) \(N-m\)  \(kg-m^2-s^{-2}\)  -
\(\tau\) tau maximum shear stress \(\large{\frac{lbf}{in^2}}\) \(MPa\) \(N-mm^{-2}\)  -
\(S\) - maximum soil moisture retention after runoff begins - - - -
\(H_{sp}\) - maximum surge pressure head in a length of pipe \(\large{\frac{lbf}{in^2}}\) \(Pa\) \(kg-m^{-1}-s^{-2}\)  -
\(P_{spf}\) - maximum surge pressure for a fluid \(\large{\frac{lbf}{in^2}}\) \(Pa\) \(kg-m^{-1}-s^{-2}\)  -
\(m\), \(\;\mu\) mu mean - - -  -
\(D\) - mean coil diameter \(in\) \(mm\) \(mm\) -
\(h_m\) - mean depth \(in\) \(mm\) \(mm\)  -
\(MEP\) - mean effective pressure \(\large{\frac{lbf}{in^2}}\) \(Pa\) \(kg-m^{-1}-s^{-2}\) -
\(v\) - mean flow velocity - - -  -
\(l\), \(\;\lambda\) lambda mean free path \(ft\) or \(in\) \(m\) or \(mm\) \(m\) or \(mm\)  -
\(\tau\), \(\;\tau_m\) tau mean life - - -  -
\(E_cm\) - mean modulus of elasticity of concrete \(\large{\frac{lbf}{in^2}}\) \(MPa\) \(N-mm^{-2}\)  -
\(E_cm28\) - mean modulus of elasticity of concrete at 28 days \(\large{\frac{lbf}{in^2}}\) \(MPa\) \(N-mm^{-2}\)  -
\(E_cmt\) - mean modulus of elasticity of concrete at age t \(\large{\frac{lbf}{in^2}}\) \(MPa\) \(N-mm^{-2}\)  -
\(E_cmto\) - mean modulus of elasticity of concrete when loading starts at age t_o \(\large{\frac{lbf}{in^2}}\) \(MPa\) \(N-mm^{-2}\)  -
\(v_m\) - mean velocity \(\large{\frac{ft}{sec}}\) \(\large{\frac{m}{s}}\) \(m-s^{-1}\)  -
\(h\) - mean water depth \(ft\) \(m\) \(m\)  -
\(M\) - mechanical advantage dimensionless -
\(ME\) - mechanical efficiency dimensionless  -
\(ME\) - mechanical energy \(lbf-ft\) \(J\)  \(kg-m^2-s^{-2}\)  -
\(W\) - mechanical work - - -  -
\(\rho_m\) rho media density \(\large{\frac{lbm}{ft^3}}\) \(\large{\frac{kg}{m^3}}\) \(kg-m^{-3}\)  -
\(MP\) - melting point \(F\) \(C\) \(x+273.15\;K\)  
\(Z_w\) - metal removal rate \(\large{\frac{ft^3}{min}}\) \(\large{\frac{m^3}{s}}\) \(m^3-s^{-1}\)    -
\(m\) - midordinate - - - -
\(I_{min}\) - minimum moment of inertia of \(I_x\) and \(I_y\) \(in^4\) \(mm^4\) \(mm^4\)  -
\(h_{l-minor}\) - minor head loss \(ft\) \(m\) \(m\)  -
\(K\) - minor loss coefficient dimensionless  -
\(K\) - mixing factor - - -  -
\(\mu\), \(\;\mu_n\), \(\;\mu_p\) mu mobility - - -  -
\(b\) - mobility ratio - - -  -
\(C_m\) - modification factor for combined stress in steel design - - -  -
\(\lambda\), \(\;E\) lambda modulus of elasticity \(\large{\frac{lbf}{in^2}}\) \(MPa\) \(N-mm^{-2}\)   -
\(E\) - modulus of elasticity earthquake load for LRFD design \(\large{\frac{lbf}{in^2}}\) \(MPa\) \(N-mm^{-2}\)   -
\(U_r\) - modulus of resilience \(lbf\;/\;in^2\) \(MPa\) \(N-mm^{-2}\)   -
\(G\), \(\;\mu\) mu modulus of rigidity \(\large{\frac{lbf}{in^2}}\)  \(MPa\) \(N-mm^{-2}\)   -
\(G\) - modulus of torsional - - - -
\(U_t\) - modulus of toughness - - -  -
\(n\) - modular ratio dimensionless  -
\(m\) - module - - -  -
\(MC\) - moisture content dimensionless  -
\(M\) - molar concentration \(\large{\frac{lbmol}{ft^3}}\) \(\large{\frac{kmol}{m^3}}\)  \(kmol-m^{-3}\)    -
\(H\) - molar enthalpy \(\large{\frac{Btu}{lbmol}}\) \(\large{\frac{kJ}{kmol}}\)  \(kJ-kmol^{-1}\)  -
\(S\) - molar entropy \(\large{\frac{Btu}{lbmol-R}}|\) \(\large{\frac{kJ}{kmol-K}}\)  \(kJ-kmol^{-1}-K^{-1}\)  -
\(x\) - molar fraction dimensionless  -
\(M\) - molar gas - - -  -
\(R\) - molar gas constant \(\large{ \frac{lbf-ft}{lbmol-R} }\) \(\large{ \frac{J}{kmol-K} }\)  \(J-kmol^{-1}-K^{-1}\)  \(8.314\;462\;618\;153\;24\) \(\large{ \frac{J}{kmol-K} }\)
\(c_m\) - molar heat \(\large{\frac{Btu}{lbmol}}\) \(\large{\frac{kJ}{kmol}}\)  \(kJ-kmol^{-1}\)  -
\(U\) - molar internal energy \(\large{\frac{Btu}{lbmol}}\) \(\large{\frac{kJ}{kmol}}\)  \(kJ-kmol^{-1}\)  -
\(M\) - molar mass \(\large{\frac{lbm}{mol}}\) \(\large{\frac{kg}{mol}}\)  \(kg-mol^{-1}\)  \(0.999\;999\;999\;65\;(30)\;x\;10^{-3}\) \(\large{\frac{g}{mol}}\)
\(M_u\) - molar mass constant \(\large{\frac{lbm}{mol}}\) \(\large{\frac{kg}{mol}}\)  \(kg-mol^{-1}\) \(0.999\;999\;999\;65\;(30)\;x\;10^{-3}\) \(\large{\frac{g}{mol^{-1}}}\)
\(M(^12 C)\) - molar mass of carbon-12 \(\large{\frac{lbm}{mol}}\) \(\large{\frac{kg}{mol}}\) \(kg-mol^{-1}\) \(11.999\;999\;9958 x 10^{-3}\) \(\large{\frac{g}{mol^{-1}}}\)
\(M\) - molar mass of gas \(\large{\frac{lbm}{mol}}\) \(\large{\frac{kg}{mol}}\) \(kg-mol^{-1}\) -
\(N_a h\) - molar Planck constant \(\large{\frac{lbf-ft}{sec}}\) \(J-s\) \(kg-m^2-s^{-1}\) \(6.626\;070\;15...\;x\;10^{-34}\) \(J-s\)
\(r\) - molar ratio of solution - - -  -
\(C\)   molar specific heat \(\large{\frac{Btu}{lbmol-F}}\) \(\large{\frac{kJ}{kmol-K}}\) \(kJ-kmol^{-1}-K^{-1}\)  -
\(V\) - molar specific volume \(\large{\frac{ft^3}{lbmol}}\) \(\large{\frac{m^3}{kmol}}\) \(m^3-kmol^{-1}\)  -
\(V_m\) - molar volume \(\large{\frac{ft^3}{mol}}\) \(\large{\frac{m^3}{mol}}\) \(m^3-mol^{-1}\)  -
\(V_m\) - molar volume of ideal gas \(\large{\frac{ft^3}{mol}}\) \(\large{\frac{m^3}{mol}}\) \(m^3-mol^{-1}\) \(0.022\;413\;969\;545\;014...\) \(\large{\frac{m^3}{mol}}\) at \(0\;C\) 
\(M\) - molarity \(\large{\frac{mol}{gal}}\) \(\large{\frac{mol}{L}}\) \(mol-L^{-1}\)  -
\(m\) - molarity of solution - - -  -
\(n\) - mole \(mol\) \(mol\) \(mol\)   \(6.022\;140\;76\;x\;10^{23}\) \(mol\)
\(\chi \) chi mole fraction dimensionless  -
\(n\) - moles of solution \(mol\) \(mol\) \(mol\)  -
\(MW\) - molecular weight \(\large{\frac{lbm}{lbmol}}\) \(\large{\frac{kg}{kmol}}\) \(kg-kmol^{-1}\)  -
\(M\) - moment \(\large{\frac{lbf}{sec}}\) \(\large{\frac{kg-m}{s}}\) \(kg-m-s^{-1}\)  -
\(M\) - moment about the neuteal axis \(\large{\frac{lbf}{sec}}\) \(\large{\frac{kg-m}{s}}\) \(kg-m-s^{-1}\) -
\(M\) - moment of force \(lbf-ft\) \(N-m\) \(kg-m^2-s^{-2}\)  -
\(I\), \(\;J\) - moment of inertia \(in^4\) \(mm^4\) \(mm^4\)  -
\(I_{cm}\) - moment of inertia center of mass \(in^4\) \(mm^4\) \(mm^4\) -
\(I_c\), \(\;\overline{I}\) - moment of inertia about the centroid \(in^4\) \(mm^4\) \(mm^4\)  -
\(I_x\) - moment of inertia with respect to an x-axis \(in^4\) \(mm^4\) \(mm^4\)  -
\(I_y\) - moment of inertia with respect to an y-axis \(in^4\) \(mm^4\) \(mm^4\)  -
\(p\) - momentum \(\large{\frac{lbm-ft}{sec}}\) \(\large{\frac{kg-m}{s}}\) \(kg-m-s^{-1}\)   -
\(p\) - momentum change in velocity \(\large{\frac{lbm-ft}{sec}}\) \(\large{\frac{kg-m}{s}}\) \(kg-m-s^{-1}\)  -
\(\Delta p\) - momentum differential \(\large{\frac{lbm-ft}{sec}}\) \(\large{\frac{kg-m}{s}}\) \(kg-m-s^{-1}\)  -
\(I\) - moment of inertia of a circle \(in^4\) \(mm^4\) \(mm^4\) -
\(I\) - moment of inertia of a cube \(in^4\) \(mm^4\) \(mm^4\) -
\(I\) - moment of inertia of a cylinder \(in^4\) \(mm^4\) \(mm^4\) -
\(I\) - moment of inertia of a mass \(in^4\) \(mm^4\) \(mm^4\) -
\(I\) - moment of inertia of a quarter circle \(in^4\) \(mm^4\) \(mm^4\) -
\(I\) - moment of inertia of a rectangle \(in^4\) \(mm^4\) \(mm^4\) -
\(I\) - moment of inertia of a semicircle \(in^4\) \(mm^4\) \(mm^4\) -
\(I\) - moment of inertia of a sphere \(in^4\) \(mm^4\) \(mm^4\) -
\(I\) - moment of inertia of a thin rod \(in^4\) \(mm^4\) \(mm^4\) -
\(I\) - moment of inertia of a triangle \(in^4\) \(mm^4\) \(mm^4\) -
\(I\) - moment of inertia of a annulus \(in^4\) \(mm^4\) \(mm^4\) -
\(I\) - moment of inertia of a ellipse \(in^4\) \(mm^4\) \(mm^4\) -
\(M\) - moment of mass \(\large{\frac{lbm-ft}{sec}}\) \(\large{\frac{kg-m}{s}}\) \(kg-m-s^{-1}\)  -
\(Mo\) - Morton number dimensionless  -
\(m\) - motion \(ft\) \(m\) \(m\) -
\(\eta_m\) eta motor efficiency dimensionless -
\(MHP\), \(HP_m\) - motor horsepower \(\large{\frac{lbf-ft}{sec}}\) \(\large{\frac{Btu}{s}}\) \(Btu-s^{-1}\)  -
\(M\) - mutual inductance - - -  -
Symbol Greek Symbol Definition English Metric   Value

 

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