$($aFor the following data calculate the terminal velocity and the diameter of the amine contactor column. Gas flow rate $=7$ MMscfd Specific gravity of gas $=0\mathrm{.}65$ Specific gravity of MDEA at $20/20\backslash$deg C $=1\mathrm{.}041$ Density of water $=62\mathrm{.}4$ lb$/$ft$3$ Temperature $=60\backslash$deg F Pressure $=500$ psig