Physics P1 0.0 / 5 ? PhysicsEnergy for the HomeGCSEOCR Created by: ellieCreated on: 23-05-15 19:18 What is Heat? A measure of energy 1 of 28 What happens when a substance us heated? Particles gain kinetic energy 2 of 28 What happens in gases and liquids? Particles move faster 3 of 28 What happens in solids? Particles viberate 4 of 28 What is temperature? A measure of hotness 5 of 28 What happens to the KE if somethings hot? KE increases 6 of 28 How does energy flow? From hot to cool objects 7 of 28 What happens if theres a difference in temperature? Engery then flows between the two objects 8 of 28 What does the specific heat capacity show? How much energy something can store 9 of 28 What is Specific heat capacity? How much energy it takes to heat 1KG of something by 1 degree 10 of 28 What is the formula for Specific heat capacity? Energy= Mass x Specific heat capacity x temperature change 11 of 28 Descibe the heating process? Solid (melting), liquid (boiling), gas 12 of 28 Descibe the process of cooling? Gas (condensing), liquid (freezing), solid 13 of 28 What is specific latent heat? The energy needed to melt/boil 1KG material without changing its temperature 14 of 28 Formula for Specific latent heat? Energy= Specific latent heat x mass 15 of 28 Where does conduction occur? Solids 16 of 28 Explain the process of conduction? Conduction of heat is the process where viberting particles pass on extra kinetic energy to neighbouring particles 17 of 28 Where does covection occur? Liquids and gases 18 of 28 Explain the process of convection? Convection occurs when the more energetic particles move from the hotter region to the cooler region and taking their heat with them. 19 of 28 How is radiation different to conduction and convection? Does not need a medium to travel through and can only occur through transparent materials like air, sun or glass 20 of 28 What is a good absorber and emitter of radiation? Matt black surface 21 of 28 Name a poor absorber? White shiny surfaces as they deflect heat 22 of 28 How to grills and toasters heat food? Using infrared radiation 23 of 28 Name a source that emmits infrared radiation? A radiator 24 of 28 Name a source that loses energy? Computers and windows 25 of 28 Name some ways to prevent energy lose? Curtains can be used as windows are energy sinks 26 of 28 What is payback time? When you have something to reduce energy loss and eventually the money saved covers the initial cost 27 of 28 Formula for payback time? Payback time = Initial cost / annual saving 28 of 28
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