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]​

Apreheater involves the use of condensing steam at 100°c on the inside of a bank of tubes to heat air that enters at 1 atm and 25°c. the air moves at 5 m/s in cross flow over the tubes. each tube is 1 m long and has an outside diameter of 10 mm. what is the minimum value of nl needed to achieve an outlet temperature of t 75 c? what is the corresponding pressure drop across the tube bank?