Edexcel IGCSE Physics: Double Science 复习笔记：1.1.1 Distance-Time Graphs Distance-Time Graphs A distance-time graph shows how the distance of an object moving in a straight line (from a st...
Intro to Proof by Induction What is proof by induction? Proof by induction is a way of proving a result is true for a set of integers by showing that if it is true for one integer then it is true f...
Damped or Forced Harmonic Motion What is damped harmonic motion? If we add a term representing a resistive force to the simple harmonic motion equation, the new equation describes a particle underg...
Simple Harmonic Motion (SHM) Equations What is simple harmonic motion? A particle undergoing simple harmonic motion moves along a straight line subject to the following constraints: The acceleratio...
Coupled First Order Linear Equations What are coupled first order linear differential equations? Coupled first order linear differential equations are a pair of simultaneous differential equations ...
Second Order Differential Equations What is a second order differential equation? A second order differential equation is an equation containing second order derivatives (and possibly first order d...
Edexcel IGCSE Biology: Double Science 复习笔记 5.3.2 Genetic Engineering: Insulin Manufacturing Insulin The gene for human insulin can be inserted into bacteria which then produce human insu...
Edexcel IGCSE Biology: Double Science 复习笔记 5.3.1 The Process of Genetic Engineering The Process of Genetic Engineering The gene that is to be inserted is located in the original organism...
Edexcel IGCSE Biology: Double Science 复习笔记 5.2.1 Selective Breeding Selective Breeding in Animals Selective breeding or artificial selection means to select individuals with desirable ch...
