Modelling using First Order Differential Equations Why are differential equations used to model real-world situations? A differential equation is an equation that contains one or more derivatives D...
First Order Differential Equations What is a differential equation? A differential equation is simply an equation that contains derivatives For example is a differential equation And so is What is...
今年A-Level普遍压分的情况下（尤其是PoE考生），不少学生都在积极准备10月的重考。当时我们盘点了一些热门大学对重考的态度，其中UCL明确表示：大部分专业都能接受，不过具体看专业官网说法。 就在近日，UCL官网...
General Solutions What is a differential equation? Any equation, involving a derivative term, is a differential equation Equations involving only first derivative terms are called first order diffe...
Edexcel IGCSE Biology: Double Science 复习笔记 5.1.2 Crop Plants: Increasing Yield Crop Plants: Fertilisers Modern technology has increased food supply substantially in two key ways: Fertili...
Finding Tangents to Polar Curves What is the gradient/tangent of a polar curve? Gradients (and tangents) are the same as using Cartesian coordinates i.e. a gradient of 1 in Cartesian coordinates is...
Edexcel IGCSE Biology: Double Science 复习笔记 5.1.1 Crop Plants: Glasshouses & Polythene Tunnels Crop Plants: Glasshouses & Polythene Tunnels If a plant is given unlimited light, ca...
Edexcel IGCSE Biology: Double Science 复习笔记 5.1.1 Crop Plants: Glasshouses & Polythene Tunnels Crop Plants: Glasshouses & Polythene Tunnels If a plant is given unlimited light, ca...
Edexcel IGCSE Biology: Double Science 复习笔记 4.4.2 Greenhouse Gases Greenhouse Gases A greenhouse gas is a gas that absorbs infrared radiation from the Sun so it remains trapped in the Ear...
Edexcel IGCSE Biology: Double Science 复习笔记 4.4.1 The Effects of Pollution The Effects of Pollution Human population growth globally has been increasing exponentially for the last 150 yea...
Edexcel IGCSE Biology: Double Science 复习笔记 4.3.1 Water Cycle & Carbon Cycle The Water Cycle Water molecules move between various locations – such as rivers, oceans and the atmosphere...
Edexcel IGCSE Biology: Double Science 复习笔记 4.2.3 Food Pyramids & Transfer of Energy Food Pyramids A pyramid of numbers shows how many organisms we are talking about at each level of ...
