A settling chamber is to be used to collect particles of 50 diameter & 2000 Kg/ m3 density from a stream of 10 m3 /s of standard air . If the chamber is to be 1.5 m wide, 1.5 m high, & if it will have nine trays including the bottom surface, how long must it be to give theoretically perfect collection efficiency? (a) Do the computations on the assumption that the laminar equations hold. (b) Compute the Re number & decide if the laminar assumption is reasonable. If not , how many trays need be included to make the flow laminar? Recalculate the length in this case. (c) What will be the collection efficiency for particles of 25 diameter