| Symbol | Greek Symbol | Definition | US | Metric |
|---|
| \( R\) |
- |
ideal gas constant |
\(ft-lbf/lbmol-^\circ R\) |
\(J/kmol\cdot K\) |
| \(I\) |
- |
impulse |
\(lbf-sec\) |
\(N\cdot s\) |
| \(L\) |
- |
inductance |
- |
\(H\) |
| \(X_L\) |
- |
inductive reactance |
- |
- |
| \(l_i\) |
- |
initial length |
- |
- |
| \(x_i\) |
- |
initial position |
- |
- |
| \(T_i\) |
- |
initial temperature |
- |
- |
| \(t_i\) |
- |
initial time |
- |
- |
| \(v_i\) |
- |
initial velocity |
- |
\(m/s\) |
| \(V_i\) |
- |
initial volume |
- |
- |
| \(p_i\) |
- |
inlet pressure |
- |
- |
| \(a_i\) |
- |
instantaneous acceleration |
- |
- |
| \(v_i\) |
- |
instantaneous velocity |
- |
- |
| \(I\) |
- |
interference |
- |
- |
| \(U\) |
- |
internal energy |
\(Btu/lbm\) |
\(kJ/kg\) |
| \(\alpha\) |
alpha |
isentropic compressibility |
\(1/ ^\circ R\) |
\(1/K\) |
| \(\beta\) |
beta |
isobaric compressibility |
\(1/ ^\circ R\) |
\(1/K\) |
| \(\kappa\) |
kappa |
isothermal compressibility |
\(1/ ^\circ R\) |
\(1/K\) |
