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...
Reflection & Refraction All waves, whether transverse or longitudinal, can be reflected and refracted Reflection occurs when: A wave hits a boundary between two media and does not...
Edexcel IGCSE Physics: Double Science 复习笔记：3.2.5 Core Practical: Investigating Snell's law Core Practical 5: Investigating Snell's Law Aim of the Experiment To investigate the refractiv...
Exponential Growth & Decay What are exponential growth and exponential decay? y = Aekt is exponential growth y = Ae-kt is exponential decay k > 0 so plus or minus sign in equation immediatel...
