Physics: P1- Energy Transfer By Heating 0.0 / 5 ? PhysicsEnergyGCSEAQA Created by: luciieeebxCreated on: 23-01-15 17:30 What do all objects emit? Infrared Radiation 1 of 17 What surfaces are good absorbers and emitters? Dark, matt surfaces 2 of 17 What surfaces are god reflectors? Light, shiny surfaces 3 of 17 What state does conduction occur in? Solids 4 of 17 What do metals have that helps to conduct well? Free moving electrons 5 of 17 What are poor conductors called? Insulators 6 of 17 What does convection occur in? Fluids (liquids and gases) 7 of 17 What transfers the energy? Convection Current 8 of 17 What increases the rate of evaporation? Surface area, temperature and draught 9 of 17 What increases the rate of condensation? Surface area and reducing surface temperature 10 of 17 What increases energy transfer? temperature difference 11 of 17 What does a flask have to insulate? plastic cap, double walled glass, plastic cover, inside surfaces are silver and vacuum 12 of 17 What is the equation for specific heat capacity? E = m x c x theta 13 of 17 What do they stand for? Energy in J, Mass in kg, specific heat capacity in J/kgdegreeC and temperature change in degrees C 14 of 17 What is used for insulation in a house? Fibreglass loft insulation, cavity wall insulation, double glazing, draught proofing aluminium foil 15 of 17 What is a U-value? How much energy per second passes through. 16 of 17 What is the rule for a U-value? The lower the U-value, the better the material is at insulating 17 of 17
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