Formula Symbols - I

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
\( R\) - ideal gas constant - \(JK^{-1} mol^{-1}\)
\(lx\) - illuminance - \(lm\;/\;m^2\)
\(b\) - impact parameter - -
\(Z\) - impedance - -
\(I\) - impulse \(lbf-sec\) \(N-s\)
\(I\) - incident energy \(Btu \;/\; ft^2-hr\) \(W \;/\; m^2\)
\(H \;or\; L\) - inductance - \(Wb\;/\;A\)
\(n\) - index of refraction - -
\(X_L\) - inductive reactance - -
\(a_i\) - initial acceleration \(ft\;/\;sec^2\) \(m\;/\;s^2\)
\(\omega_i\) omega initial angular velocity \(ft\;/\;sec\) \(m\;/\;s\)
\(l_i\) - initial length - -
\(x_i\) - initial position - -
\(T_i\) - initial temperature - -
\(t_i\) - initial time \(sec\) \(s\)
\(v_i\) - initial velocity \(ft\;/\;sec\) \(m\;/\;s\)
\(V_i\) - initial volume - -
\(p_i\) - inlet pressure \(lb\;/\;ft^2 \;or\; psi\) \(Pa\)
\(a_i\) - instantaneous acceleration \(ft\;/\;sec^2\) \(m\;/\;s^2\)
\(\alpha_i\) alpha instantaneous angular acceleration \(lbf\;/\;ft^2-sec\) \(Pa-s\)
\(v_i\) - instantaneous velocity - -
\(n_i\) - instrinsic number density - -
\(I\) - interference - -
\(a\) - interference factor - -
\(alpha\) alpha internal conversion coefficient - -
\(U\) - internal energy \(ft-lbf\) \(J\)
\(d\) - internal pipe diameter \(in\) \(mm\)
\(w_{ci}\) - ion cyclotron circular frequency - -
\(T_i\) - ion temperature - -
\(\alpha\) alpha isentropic compressibility \(1\;/\; R\) \(1\;/\;K\)
\(k\) - isentropic exponent - -
\(\beta\) beta isobaric compressibility \(1\;/\; R\) \(1\;/\;K\)
\(\kappa\) kappa isothermal compressibility \(1\;/\; R\) \(1\;/\;K\)