Problem $2$: Calculate the new efficient, if only $($using Table $4\mathrm{.}3$ from the Cooper book or page from the lecture notes$)$

$20$

a$)$ inlet gas velocity decreases to $15\frac{m}{s},$ rest all parameters remains the same.

b$)$ particulate density decreases to $1000k\frac{g}{m}3,$ rest all parameters remains the same including the $V_i=25\frac{m}{s}.$

Table $4\mathrm{.}3$ Effects of Operating Condition Changes on Cyclone Performance

$\backslash$table$[[$Variable$,$Change,Efficiency,Relationship$],[$Gas Flow Rate,Increase,Increase,$P\frac{t_2}{P}{t}_1=(\frac{Q_1}{Q_2}{)}^{0\mathrm{.}5}$