IB DP Maths: AA HL复习笔记3.6.1 Simple Identities
Simple Identities What is a trigonometric identity? They are used to help simplify trigonometric equations before solving them Sometimes you may see identities written with the symbol ≡ This means ...
AQA A Level Physics复习笔记7.3.2 Energy of an Orbiting Satellite
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...
AQA A Level Physics复习笔记7.3.1 Circular Orbits in Gravitational Fields
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
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...
IB DP Maths: AA HL复习笔记3.5.3 Modelling with Trigonometric Functions
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
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...
AQA A Level Physics复习笔记7.2.4 Work Done on a Mass
Work Done on a Mass When a mass is moved against the force of gravity, work is done The work done in moving a mass m is given by: ∆W = m∆V Where: ∆W = change in work done (J) m = mass (kg) ∆...
IB DP Maths: AA HL复习笔记3.5.2 Transformations of Trigonometric Functions
Transformations of Trigonometric Functions What transformations of trigonometric functions do I need to know? As with other graphs of functions, trigonometric graphs can be transformed through tran...
AQA A Level Physics复习笔记7.2.3 Graphical Representation of Gravitational Potential
Graphical Representation of Gravitational Potential Gravitational field strength, gand the gravitational potential,V can be graphically represented against the distance from the centre of a ...
