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 復習筆記 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 復習筆記 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...
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) ?...
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...
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 ...
Calculating Gravitational Potential The equation for gravitational potential?V?is defined by the mass?M?and distance?r: Where: V?= gravitational potential (J kg-1) G?=?Newton’s gravitational...
Gravitational Potential The gravitational potential energy (G.P.E) is the energy an object has when lifted off the ground given by the familiar equation: G.P.E =?mgΔh The G.P.E on the surfac...
