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 ...
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 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...
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 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 Core Practical 9: Determining Density Equipment List Resolution of measuring equipment: 30 cm ruler = 1 mm Vernier ca...
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...
Edexcel IGCSE Physics 复习笔记 5.1.1 Density Density Density is defined as: The mass per unit volume of a material Objects made from low density materials typically have a low ...
美国留学一年一百万正常吗？ 知乎上这个浏览量近40万的热门提问 引起了美本留学党的激烈讨论： “表姐在美国加州大学戴维斯分校读书，每年花销100w左右，有时甚至达到120w。” “我问了身边去美国留学的朋友，表示一...
Edexcel IGCSE Physics 复习笔记 4.2.7 Comparing Energy Resources Comparing Energy Resources Each energy resource has various advantages and disadvantages associated with it A renewable energy...
Edexcel IGCSE Physics 复习笔记 4.2.6 Energy Resources Energy Resources Energy resources are large stores of energy that can be transferred from one form into electrical energy that can be us...
Finding the Constant of Integration What is the constant of integration? When finding an anti-derivative there is a constant term to consider In terms of graphing an anti-derivative, there are endl...
