Chain Rule What is the chain rule? How do I know when to use the chain rule? How do I use the chain rule? Are there any standard results for using chain rule? Exam Tip You should aim to be able to ...
Edexcel IGCSE Physics 复习笔记 2.1.3 Resistance Calculating Current, Resistance & Potential Difference Resistance is defined as the opposition to current: The higher the resistance of a ...
Edexcel IGCSE Physics 复习笔记 2.1.2 Voltage & Energy Voltage The terminals of a cell make one end of the circuit positive and the other negative This sets up a potential difference acro...
Edexcel IGCSE Physics 复习笔记 2.1.1 Charge & Current Current Electric current is defined as the rate of flow charge In other words, the size of an electric current is the amount of char...
Disproof by Counter Example What is disproof by counter-example? Disproof by counter-examples involves finding a value that does not work for the given statement That value is called a count...
Edexcel IGCSE Physics 复习笔记 1.4.3 Centre of Gravity Centre of Gravity The centre of gravity of an object (sometimes called the centre of mass) is defined as: The point through which the weight o...
Proof by Exhaustion What is proof by exhaustion? Proof by exhaustion is a way to show that the desired result works for every allowed value How do I prove a result by exhaustion? Using proof by exh...
Edexcel IGCSE Physics 复习笔记 1.4.2 The Principle of Moments The Principle of Moments The principle of moments states that: If an object is balanced, the total clockwise moment about...
Differentiating Trig Functions How do I differentiate sin and cos? For calculus with trigonometric functions angles must be measured in radians Ensure you know how to change the angle mode on your ...
