A material in its single crystalline form is projected to have a yield strength of 25 MPa. Its grain size is regulated by the rate of solidification from its liquid phase to a diameter of 0.0625 mm. What is the new yield strength (in MPa) if ky

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]