Energy and kinetic theory

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  • Energy and kinetic theory
    • Energy
      • Heat radiation
        • Heat is transferred through conduction, convection and radiation.
        • Transfer of heat by infrared radiation.
        • Infrared radiation
          • Emitted by solids, liquids or gases.
          • Objects can both emit and absorb radiation.
          • An object hotter than its surroundings emits more infrared radiation. If it is cooler it absorbs more radiation.
            • The hotter it is the more it radiates infrared in a given time. This radiation is sometimes felt by humans.
          • Dark, matt surfaces absorb infrared radiation whereas light, shiny surfaces reflect them
    • Kinetic theory
      • Solids
        • Strong bonds between the atoms.
        • The particles don't move and can only vibrate.
        • The particles are in a fixed and regular arrangement.
      • Liquids
        • Weak forces between the particles
        • Close together but can move around eachother
        • More energy and can travel in random directions at different speeds.
      • Gases
        • Almost no forces of attraction between atoms.
        • More enegy and are free to move at different directions at high speeds.


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