Design a Lapple conventional cyclone to function as a precleaner The particles have a density of $1250k\frac{g}{m^3},$ and have the same size distribution as in Problem $4\mathrm{.}4,$ but the air is at $150F$ and $1$ atm, and is flowing at $2000$acfm. The cyclone need be only $65-75\%$ efficient. Specify your final choice of body diameter and the corresponding efficiency.