Gradients, Tangents & Normals Using the derivative to find the gradient of a curve To find the gradient of a curve?y=?f(x)?at any point on the curve, substitute the?x?coordinate?of the point in...
Differentiating Powers of x How do I differentiate expressions involving powers of?x? Powers of?x?are differentiated according to the following formulae: Differentiating terms with positive integer...
Edexcel IGCSE Physics: Double Science 复习笔记：4.1.2 Conservation of Energy Conservation of Energy The principle of conservation of energy states that: Energy cannot be created or de...
Edexcel IGCSE Physics: Double Science 复习笔记：4.1.1 Energy Stores & Transfers Energy Stores & Transfers Energy can be stored in different ways, and there are changes in the way it ...
First Principles Differentiation What is the derivative or gradient function? For a curve?y?=?f(x)?there is an associated function called the?derivative?or?gradient function The derivative of f(x) ...
Definition of Gradient What is the gradient of a curve? At a given point the?gradient?of a curve is defined as the gradient of the?tangent?to the curve at that point A?tangent?to a curve is a line ...
Using Log Graphs in Modelling What are log graphs? Log graphs are used when the scale of a graph increases or decreases exponentially It can very difficult to read specific values from graphs with ...
Edexcel IGCSE Physics: Double Science 复习笔记：3.2.6 Total Internal Reflection Total Internal Reflection Sometimes, when light is moving from a denser medium towards a less dense one, inste...
Using Exps & Logs in Modelling What is exponential modelling? Exponential modelling is where real-life situations are modelled using exponential growth and decay Exponential growth is typically...
