Problem: A solution containing $0\mathrm{.}9$ wt$\%$ protein undergoes ultrafiltration using a pressure difference of $5$ psi. The membrane permeability is A$=1\mathrm{.}37$ x $10-2$ kg$/$sm$2$atm. Assuming no effects of concentration polarization or fouling, predict the flux in kg$/$sm$2$ and in gal$/$ft$2$day. List all assumptions.