water is flowing uniformly in a finished - concrete channel of trapezoidal cross section with a bottom width of 0.8 m, side slope of 1 : 1 and the bottom slop of 0.0001. if the flow depth is measured to be 0.52 m, determine the flow rate of water through the channel.[take the meaning coefficient of the finished concrete as 0.012]​

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?