A trapezoidal flume carries water. It has a base of 30 cm, a top of 60 cm, and sloped wall lengths of 25 cm. The water flowing in the flume has a vertical depth of 16 cm with a wetted perimeter of 70 cm. The flume has a Manning roughness coefficient of 0.02 and a slope of 10 m/km. The total flume area is 900 cm2, while the flow area is 672 cm2. Using the Manning equation for open channel flow, what is most nearly the velocity in the flume in m/s

Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]