Compound Angle Formulae What are the compound angle formulae? There are six compound angle formulae (also known as addition formulae), two each for sin, cos and tan: For sin the +/- sign on the lef...
Edexcel IGCSE Chemistry 复习笔记 1.1.5 Practical: Investigate the Solubility of a Solid in Water at a Specific Temperature Practical: Investigate the Solubility of a Solid in Water at a Specific Te...
Edexcel IGCSE Chemistry 复习笔记 1.1.4 Solubility Solubility Solubility is a measurement of how much of a substance will dissolve in a given volume of a liquid The liquid is called the solve...
Edexcel IGCSE Chemistry 复习笔记 1.1.3 Solutions Solutions Terminology You need to know all the following terms used when describing solutions: Terminology About Solutions Table 转载...
Energy of an Orbiting Satellite An orbiting satellite follows a circular path around a planet Just like an object moving in circular motion, it has both kinetic energy (KE) and gravitational...
Circular Orbits in Gravitational Fields Since most planets and satellites have a near circular orbit, the gravitational force FG between the Sun and another planet provides the centripetal f...
Edexcel IGCSE Biology 复习笔记 1.1.2 Diffusion & Dilution Diffusion & Dilution Diffusion and dilution experiments support a theory that all matter (solids, liquids and gases) is made...
Modelling with Trigonometric Functions What can be modelled with trigonometric functions? Anything that oscillates (fluctuates periodically) can be modelled using a trigonometric function Normally ...
Edexcel IGCSE Chemistry 复习笔记 1.1.1 The Three States of Matter The Three States of Matter The three states of matter are solids, liquids and gases A substance can usually exist in all thr...
