Edexcel IGCSE Chemistry 复习笔记 1.4.1 Periodic Table: Basics
Edexcel IGCSE Chemistry 复习笔记 1.4.1 Periodic Table: Basics Arrangement of the Periodic Table There are over 100 chemical elements which have been isolated and identified Elements are arra...
AQA A Level Physics复习笔记7.4.2 Electric Field Lines
Representing Electric Fields The direction of electric fields is represented by electric field lines Electric field lines are directed from positive to negative Therefore, the field lines mu...
Edexcel IGCSE Chemistry 复习笔记 1.3.2 Calculate Relative Atomic Mass
Edexcel IGCSE Chemistry 复习笔记 1.3.2 Calculate Relative Atomic Mass Calculate Relative Atomic Mass The relative atomic mass of each element is calculated from the mass number and relative abundan...
AQA A Level Physics复习笔记7.4.1 Coulomb's Law
Coulomb's Law All charged particles produce an electric field around it This field exerts a force on any other charged particle within range The electrostatic force between two charge...
IB DP Maths: AA HL复习笔记3.6.5 Linear Trigonometric Equations
Trigonometric Equations: sinx = k How are trigonometric equations solved? Trigonometric equations can have an infinite number of solutions For an equation in sin or cos you can add 360° or 2π to ea...
Edexcel IGCSE Chemistry 复习笔记 1.3.1 Atoms: Definitions & Structure
Edexcel IGCSE Chemistry 复习笔记 1.3.1 Atoms: Definitions & Structure Atoms & Molecules It is important to understand the terms atom and molecule when referring to atomic structure, ...
提高GCSE英语和数学考试成绩是英国中考关键！
根据英国教育部规定，GCSE课程分为“必修”和“选修”两部分，必修课程包括数学、英语和科学(物理、化学、生物)，“选修”课程的覆盖范围广、种类多样，可满足不同学生的需要。英国也有“中考分流”说？提高GCSE英语和数...
IB DP Maths: AA HL复习笔记3.6.4 Relationship Between Trigonometric Ratios
Relationship Between Trigonometric Ratios What relationships between trigonometric ratios should I know? If you know a value for one trig ratio you can often use this to work out the value for the ...
Edexcel IGCSE Chemistry 复习笔记 1.2.5 Practical: Investigating Paper Chromatography
Edexcel IGCSE Chemistry 复习笔记 1.2.5 Practical: Investigating Paper Chromatography Practical: Investigate Paper Chromatography Using Inks & Food Colourings Objective: Investigate how paper ch...
AQA A Level Physics复习笔记7.3.4 Geostationary Orbits
Synchronous Orbits A synchronous orbit is: When an orbiting body has a time period equal to that of the body being orbited and in the same direction of rotation as that body These usually re...
Edexcel IGCSE Chemistry 复习笔记 1.2.4 Interpreting Chromatograms
Edexcel IGCSE Chemistry 复习笔记 1.2.4 Interpreting Chromatograms Identifying Mixtures Pure substances will produce only one spot on the chromatogram If two or more substances are the same, ...
IB DP Maths: AA HL复习笔记3.6.3 Double Angle Formulae
Double Angle Formulae What are the double angle formulae? The double angle formulae for sine and cosine are: These can be found in the formula booklet The formulae for sin and cos can be found in t...
