P1.1

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  • P1.1
    • Surfaces and Radiation
      • Dark surfaces are good absorbers or infrared radiation.
        • An object painted dull black and left in the sun will become hotter than the same object painted white.
      • Dark surfaces are also good emitters of infrared radiation.
        • An object painted black will transfer energy and cool down more quickly than the same object painted white
      • Light, shiny surfaces are good reflectors of infrared radiation
    • Conduction
      • Conduction in a metal is due to free electrons transferring energy inside the metal.
      • Non-metals are poor conductors becuase they do not contain free electrons.
      • Conduction occurs mainly in solids.
    • Convection
      • Convection occurs in fluids (Liquid or gas)
      • When a fluid is heated it expands. The fluid becomes less dense and rises.
        • The warm fluid is replaced by a cooler, denser fluid.
    • Evaporation and Condensation

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