IB DP Maths: AI HL复习笔记1.2.1 Exponents
Laws of Indices What are the laws of indices? Laws of indices (or index laws) allow you to simplify and manipulate expressions involving exponents An exponent is a power that a number (called the b...
Edexcel IGCSE Physics 复习笔记 5.2.1 Solids, Liquids & Gases
Edexcel IGCSE Physics 复习笔记 5.2.1 Solids, Liquids & Gases Solids, Liquids & Gases Matter can exist in one of three different states: solid, liquid, or gas Solids In a solid...
IB DP Maths: AI HL复习笔记1.1.3 GDC: Solving Equations
Systems of Linear Equations What are systems of linear equations? A linear equation is an equation of the first order (degree 1) It is usually written in the form ax + by + c = 0 where a, b, and c ...
BMO英国数学奥赛对中国学生开放，可直接报名！
重大好消息！ 中国学生可以直接参加BMO了！ 在此之前，BMO是让我们“望眼欲穿”的赛事。想要参加BMO，必须先参加SMC（Senior Maths Challenge）并取得优异成绩，而SMC不接受个人报名，必须由英国教育体制的学校统一...
Edexcel IGCSE Physics 复习笔记 5.1.4 Pressure in Liquids
Edexcel IGCSE Physics 复习笔记 5.1.4 Pressure in Liquids Pressure in Liquids A fluid is either a liquid or a gas When an object is immersed in a fluid, the fluid will exert pressure, squeezi...
IB DP Maths: AI HL复习笔记1.1.2 Approximation & Estimation
Approximating Values How do I know what to round my answer to? Unless otherwise told, always round your answers to 3 significant figures (3 s.f.) The first non-zero digit is the first significant d...
Edexcel IGCSE Physics 复习笔记 5.1.3 Pressure
Edexcel IGCSE Physics 复习笔记 5.1.3 Pressure Pressure Pressure is defined as The concentration of a force or the force per unit area For example, when a drawing pin is pushed ...
Edexcel IGCSE Physics 复习笔记 5.1.2 Core Practical: Determining Density
Edexcel IGCSE Physics 复习笔记 5.1.2 Core Practical: Determining Density Core Practical 9: Determining Density Equipment List Resolution of measuring equipment: 30 cm ruler = 1 mm Vernier ca...
IB DP Maths: AI HL复习笔记1.1.1 Standard Form
Standard Form Standard form (sometimes called scientific notation or standard index form) gives us a way of writing very big and very small numbers using powers of 10. Why use standard form? Some n...
