LOGOmechanical engineering An introduction to1Lecturer: Liu Ju-rongCHAPTER2 Problem-Solving SkillsOVERVIEW1UNIT SYSTEMS AND CONVERSIONS23DIMENSIONAL CONSISTENCY2SIGNIFICANT DIGITS4AN ERROR OF UNITS ON THE WAY TO MAR5APPROXIMATION IN ENGINEERING6PROBLEM-SOLVING METHODOLOGY7Vocabulary3 Torque 扭矩 thermal conductivity 热导率 shear stress 剪应力 fluid viscosity 流体的粘度 elastic modulus 弹性模量 kinetic energy 动能 Reynolds number 雷诺数1 OVERVIEW-the important of unit4Howimportantaunitis?Each quantity in mechanical en
