Edexcel IGCSE Physics 复习笔记 2.3.5 AC & DC
Edexcel IGCSE Physics 复习笔记 2.3.5 AC & DC AC & DC Direct Current A direct current (d.c.) is defined as A current that is steady, constantly flowing in the same direction in...
IB DP Maths: AI SL复习笔记3.3.1 Pythagoras & Right-Angled Triganometry
Pythagoras What is the Pythagorean theorem? Pythagoras’ theorem is a formula that works for right-angled triangles only It states that for any right-angled triangle, the square of the hypotenuse is...
U.S.News排名还有参考价值吗？
7月8日，U.S. News正式宣布，把哥伦比亚大学从2022年最佳大学排名中踢了出去！哥大18届的毕业生Ravi Campbell，在听闻消息后，决定在纽约南区联邦法院正式提交诉讼，起诉自己的母校。他表示，大部分学生选择哥大...
IB DP Maths: AI SL复习笔记3.2.2 Volume & Surface Area
Volume of 3D Shapes What is volume? The volume of a 3D shape is a measure of how much 3D space it takes up A 3D shape is also called a solid You need to be able to calculate the volume of a number ...
Edexcel IGCSE Physics 复习笔记 2.3.4 Electricity & Heat
Edexcel IGCSE Physics 复习笔记 2.3.4 Electricity & Heat Electricity & Heat When electricity passes through a component, such as a resistor, some of the electrical energy is turned in...
2022年含金量高的写作比赛，助力美本申请！
在申请美国大学时，你会发现学校非常注重学生的全面发展，因受疫情影响，标化考试不断被取消，甚至部分美国高校表示申请者无需提交SAT成绩，因此除学术成绩单硬性条件之外，软实力的提升就显得格外重要了！而写作...
IB DP Maths: AI SL复习笔记3.2.1 3D Coordinate Geometry
3D Coordinate Geometry How does the 3D coordinate system work? In three-dimensional space we can label where any object is using the x-y-z coordinate system In the 3D cartesian system, the x- and y...
IB DP Maths: AI SL复习笔记3.1.2 Arcs & Sectors
Length of an Arc What is an arc? An arc is a part of the circumference of a circle It is easiest to think of it as the crust of a single slice of pizza The length of an arc depends of the size of t...
IB DP Maths: AI SL复习笔记3.1.1 Coordinate Geometry
Basic Coordinate Geometry What are cartesian coordinates? Cartesian coordinates are basically the x-y coordinate system They allow us to label where things are in a two-dimensional plane In the 2D ...
IB DP Maths: AI SL复习笔记2.3.6 Strategy for Modelling Functions
Modelling with Functions What is a mathematical model? A mathematical model simplifies a real-world situation so it can be described using mathematics The model can then be used to make predictions...
Edexcel IGCSE Physics 复习笔记 2.3.3 Electrical Safety
Edexcel IGCSE Physics 复习笔记 2.3.3 Electrical Safety Electrical Safety Mains electricity is potentially lethal Potential differences as small as 50 V can pose a serious hazard to individua...
Edexcel IGCSE Physics 复习笔记 2.3.2 Calculating Energy Transfers
Edexcel IGCSE Physics 复习笔记 2.3.2 Calculating Energy Transfers Calculating Energy Transfers Work is done when charge flows through a circuit Work done is equal to the energy transferred &...
