Formula Symbols - A

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
\(V\) - Abbe number dimensionless number dimensionless number
\(\lambda\) lambda absolute activity - -
\(p_a\) - absolute pressure \(lbf\;/\;ft^2\) \(kPa\)
\(\epsilon \) epsilon absolute roughness \(in\) \(mm\)
\(T_a\) - absolute temperature \(^\circ F\) \(^\circ C\)
\(T_a\) - absolute temperature \(^\circ R\) \(^\circ K\)
\(\mu \) mu absolute viscosity \(lbf-sec\;/\;ft^2\) \(Pa\cdot s\)
\(\alpha\) alpha absorptance - -
\(\alpha\) alpha absorptivity - -
\(\alpha\) alpha acceleration \(lbf-sec\;/\;ft^2\) \(Pa\cdot s\)
\( a\) - acceleration \(ft/\;/\;sec^2\) \(m\;/\;s^2\)
\(g\)   acceleration of free fall \(ft\;/\;sec^2\) \(m\;/\;s^2\)
\(g\) - acceleration of gravity \(ft\;/\;sec^2\) \(m\;/\;s^2\)
\(n_a\) - acceptor number density - -
\(J \;,\; S\) - action integral - -
\(\gamma\) gamma activity coefficient dimensionless number dimensionless number
\(ACFM\) - actual flow rate \(cfm\) \(L \;/\; s\)
\(e\) - actual vapor pressure \(lbf\;/\;ft^2\) \(Pa\)
\(p\) - acoustic pressure - -
\(A\) - affinity - -
\( AHP\) - air horsepower \(hp\) -
\(F_a\) - air resistance force - -
\( AFR\) - air-fuel ratio \(lbm\;/\;lbm\) \(kg\;/\;kg\)
\( m_a\) - air mixture - -
\(s\) - AGMA stress number \(lbf\;/\;in^2\) \(Pa\)
\(Al\) - Alfven number dimensionless number dimensionless number
\(v_a\) - Alfven speed - -
\(A\) - allowance - -
\( AC\) - Alternating current amp -
\(T_a\) - ambient temperature \(^\circ F\) \(^\circ C\)
\(n \;,\; v^{18}\) - amount of substance - -
\( I\) - amp - -
\(A\) - ampere - -
\(A\) - amplitude \(ft\) \(m\)
\(A\) - amplitude \(rad\) \(rad\)
\(AR\) - amplitude ratio - -
\(\beta\) beta Andrade's beta \(hr^{- \frac{1}{3}}\) \(h^{- \frac{1}{3}}\)
\(A \;,\; \theta \;,\; deg\) theta angle \(deg\) \(deg\)
\(\phi\) phi angle \(rad\) \(rad\)
\(\Delta A\) delta angle differential \(deg\) \(rad\)
\(\gamma \) gamma angle of twist \(deg\) \(rad\)
\(\alpha\) alpha angular acceleration \(rad\;/\;sec^2\) \(rad\;/\;s^2\)
\(\theta \) theta angular displacement \(deg\) \(rad\)
\(\omega\) omega angular frequency - -
\(H\) - angular impulse - -
\(J\) - angular momentum - \(N \cdot m \cdot s\)
\(L\) - angular momentum - \(N \cdot m \cdot s\)
\(\theta\) theta angular position \(rad\) \(rad\)
\(\omega\) omega angular speed \(rad\;/\;sec\) \(rad\;/\;s\)
\(\omega \;,\; v_a\) omega angular velocity \(rad\;/\;sec\) \(rad\;/\;s\)
\(d \omega \;,\; \Delta \omega \)   angular velocity differential \(rad\;/\;sec\) \(rad\;/\;s\)
\(k\) - angular wave number - -
\(k\) - angular wave vector - -
\( F_a\) - applied force - -
\(Ar\) - Archimedes number dimensionless number dimensionless number
\(A \;,\; S\) - area \(ft^2\) \(m^2\)
\(A_d\) - area differential - -
\(f_a\) - area gradient \(ft\) \(m\)
\(Ar\) - Arrhenius number dimensionless number dimensionless number
\(R\) - aspect ratio - -
\(p_a \;,\; p_{atm}\) - atmospheric pressure \(lbf\;/\;ft^2\) \(kPa\)
\(m_a\) - atomic mass - -
\(m_u\) - atomic mass constant - -
\(u\) - atomic mass unit \(lbm\) \(kg\)
\(Z\) - atomic number dimensionless number dimensionless number
\(A\) - atomic weight \(lbm\;/\;lbmol\) \(kg\;/\;kmol\)
\(A\) - Atwood number dimensionless number dimensionless number
\(Nv\) - Avagadro's number - -
\(\Phi\) Phi availability function \(Btu \;/\; lbm\) \(kJ \;/\; kg\)
\(\bar {a} \;,\; a_a\) - average acceleration \(ft\;/\;sec^2\) \(m\;/\;s^2\)
\(\bar {F} \;,\; F_a\) - average force \(lbf\) \(N\)
\(\bar {u} \;,\; v_a\) - average speed \(ft\;/\;sec\) \(m\;/\;s\)
\(\bar {v} \;,\; v_a\) - average velocity \(ft\;/\;sec\) \(m\;/\;s\)