The mechanical properties of aluminum may be improved by incorporating fine particles of aluminum oxide (al2o3). given that the moduli of elasticity of these materials are, respectively, 69 gpa (10 × 106 psi) and 393 gpa (57 × 106 psi), plot modulus of elasticity versus the volume percent of al2o3 in al from 0 to 100 vol%, using both upper- and lower-bound expressions.

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]