A town has been directed to build an activated sludge plant that can meet an effluent standard of 13 mg/L BOD5. They have selected a completely mixed aeration tank. Calculate the volume of the aeration tank (V) (unit m3 ) using the following data:g/homework-help/questions-and- answers/determine-bod5-effluent-low -rate-trickling-filter-diameter-40- m-depth-15-m-flow-rate-2-200-q57182 303

Afan that can provide air speeds up to 60 m/s is to be used in a low-speed wind tunnel with atmospheric air at 35 c. if one wishes to use the wind tunnel to study flat-plate boundary layer behavior up to reynolds numbes of re 10, what is the minimum plate length that should be used? at what distance from the leading edge would transition occur if the critical reynolds nurnber were rer,e = 5 × 105?