Edexcel A Level Physics:复习笔记5.1 Properties of Waves
Properties of Waves Waves are generated by oscillating sources These oscillations travel away from the source Oscillations can propagate through a medium (e.g. air, water) or in a vac...
Edexcel A Level Physics:复习笔记4.10 Elastic Strain Energy
Area Under a Force-Extension Graph For a material which obeys Hooke's law, the elastic strain energy, Eel can be determined by finding the area under the force-extension graph Since this are...
Edexcel A Level Physics:复习笔记4.9 Core Practical 5: Investigating Young Modulus
Core Practical 5: Investigating Young Modulus of a Material To measure the Young Modulus of a metal in the form of a wire requires a clamped horizontal wire over a pulley (or vertical wire a...
Edexcel A Level Physics:复习笔记4.8 Stress-Strain Graphs
Stress-Strain Graphs Stress-strain curves give an indication of the properties of materials such as Up to what stress and strain they obey Hooke's Law Whether they exhibit elastic and/or pla...
Edexcel A Level Physics:复习笔记4.7 Force-Extension Graphs
Force-Extension Graphs The way a material responds to a tensile or compressive force can be shown on a force-extension, or a force-compression graph Although compression can be put into equa...
Edexcel A Level Physics:复习笔记4.6 Stress, Strain & The Young Modulus
Stress & Strain Stress Stress is the applied force per unit cross sectional area of a material Forces can be; Tensile forces, which pull on an object and extend it Compressive forces, which pus...
Edexcel A Level Physics:复习笔记4.5 Hooke's Law
Hooke's Law When a force F is added to the bottom of a vertical metal wire of length L, the wire stretches A material obeys Hooke’s Law if: The extension of the material is directly proportional to...
AP化学考试真题解析，AP化学考试的重难点是什么？
AP化学其实说难也不难，说简单也不简单，因为化学知识点又多又杂，太烦啦！而且AP化学5分率低，导致有不少同学不太敢选化学……但是对于打算申请生物化学、物理、环境科学相关专业，或者想提升课程难度、证明个人能...
2023年AP化学考试改革，AP考试如何报名？
在许多AP科目中，化学的五分率一直不高，AP化学5分容错率为25%左右，作为大部分理、工科学生必修的一门课程，是很多同学报考的科目。AP化学考试内容有哪些？2023年AP课程考试报名开启！尤其是社会考生！ AP化学课...
