A tubular bowl centrifuge is used to recover fine particles from a feed solution. At a flow rate of $10\frac{L}{m}in$ and $5000rpm,50\%$ of the fine particles can be recovered. You are now asked by your manager to increase the recovery to $90\%$ using the same centrifuge. What flow rate should you use? Assume that the particle recovery is inversely proportional to flow rate. Answer: $Q_2=5\mathrm{.}555Li\frac{t}{m}in$