Physics 1A - Energy: Heat Radiation. 0.0 / 5 ? PhysicsHeat RadiationGCSEAQA Created by: ex-JohnsonfamilyCreated on: 23-03-15 11:37 Heat energy can be transferred in three ways, name them. Conduction, convection, radiation. 1 of 15 How is most heat in solids transferred? Conduction. 2 of 15 How is most heat in liquids and gases transferred? Convection. 3 of 15 What is heat radiation? Heat radiation is the transfer of heat energy by infrared (IR) radiation. 4 of 15 All objects emit and absorb IR. True or false? True. 5 of 15 The hotter an object is, the more... Infrared radiation it gives out. 6 of 15 An object that's hotter than its surroundings... ...emits more radiation than it absorbs (So it cools down) 7 of 15 An object that's colder than it's surroundings... ...absorbs more radiation than it emits (So it heats up) 8 of 15 The bigger the temperature difference... ...the faster heat is transferred. 9 of 15 How can you feel heat radiation? If you stand next to something hot like a fire. 10 of 15 Radiation depends on two things. What are they? Surface Colour and Texture. 11 of 15 Dark, matt surfaces are... good absorbers and good emitters of infrared radiation. 12 of 15 Light, shiny surfaces are... poor absorbers and poor emitters of infrared radiation. 13 of 15 Solar hot water panels usually have water pipes under a _________ surface. black. 14 of 15 Radiation from the Sun is absorbed by the black surface to... ...heat the water in the pipes. 15 of 15
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