A cyclone is designed with an inlet width (W) of 12.0 cm and has four effective turns. The inlet gas velocity is 15.0 m/s and the particle density is 1.70 g/cm3. (a) Estimate the particle size that will be collected with 50 % efficiency. Assume the carrier gas is air at T= 77 ?C and P = 1 atm. (b) Looking at the graph of collection efficiency vs. particle size ratio, estimate what size particle would be removed at 90% efficiency in this cyclone.