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Physics IGCSE - Energy Resources and Energy Transfer Flashcards

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16291511901Energy Stores- Kinetic - Thermal - Chemical - Gravitational Potential - Elastic Potential - Electrostatic - Magnetic - Nuclear0
16291511902Energy Transfers- Mechanically (force acting on it) - Electrically (A charge moving through a p.d.) - By Heating - By Radiation (light/sound waves)1
16291511903Principle of Conservation of EnergyEnergy can never be created or destroyed2
16291511904Law of Conservation of energyTotal energy input = useful energy output + wasted energy3
16291511905Efficiency of Energy formula- Efficiency = (useful energy output / total energy input) x 100%4
16291511906Thermal energy transfer- Radiation (infrared) - Conduction (solids) - Convection (liquids and gasses)5
16291511907Thermal radiation- Infrared Radiation6
16291511908Conduction- Vibrating particles transfer kinetic energy to neighbouring particles7
16291511909Convection- Liquid and Gases only - All about change in density8
16291511911Slow thermal transfer- reduce Conduction - stop Convection Insulation traps pockets of air - reduce Radiation = Poor emitter (shiny and white)9
16291511912Workenergy transferred due to a force10
16291511913Work Done formula- Work Done = Force x Distance moved (in direction of force) - W = F x d11
16291511914Power defintion- The rate at which energy is tranferred - 1 W = 1 J of energy per second12
16291511915Power formula- Power = Work done / Time taken - P = E / t13
16291511916Kinetic Energy formula- Kinetic Energy = 1/2 x mass x ( speed ) ² - KE = 1/2 x m x v²14
16291511917Gravitational Potential formula- Gravitational Potential Energy = mass x gravitational field strength x height - GPE = m x g x h15
16291511918GPE of an objectis ALL transferred to Kinetic Energy (if no air resistance)16

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