g 11. A 1-m diameter well fully penetrates a confined aquifer with a thickness of 10 m and hydraulic conductivity of 50 m/d. Prior to pumping, the initial piezometric surface was at an elevation of 15 m. Piezometric levels in monitoring wells located 50 m and 100 m from the pumping well were measured as 13.5 m and 14.0 m, respectively. Assuming steady-state conditions, calculate (a) the pumping rate and (b) the aquifer transmissivity.

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]