Flashcards
Physics 1.1
Flashcards do conjunto (9)
- 1INFRARED RADIATIONHeat radiation is the transfer of heat energy by IR.
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IR can be emitted by solids, liquids and gasses.
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All objects are emitting and absorbing IR.
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IR is emitted from the surface of an object - 2INFRARED RADIATIONIf object is hotter than surroundings it emits>absorbs. (Cools down)
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If object is cooler than surroundings it absorbs>emits. (Warms up)
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The hotter an object is the higher the radiation in a given time. - 3INFRARED RADIATIONIR is emitted from the surface of an object.
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Temperature, colour and shininess of a surface affect how much IR is emitted. - 4INFRARED RADIATIONDark, matt surfaces absorb and emit more IR than light shiny surfaces.
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Light, shiny surfaces reflect more IR making them great for reducing energy transferred by radiation - 5Kinetic TheoryThe particles are the same- only the energy and arrangement of the particles are different.
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The movement energy is known as kinetic energy. - 6Kinetic Theory SolidsStrong forces of attraction hold particles together in a regular/uniform arrangement.
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Don't have much energy- can only vibrate about their fixed positions. - 7Kinetic Theory LiquidsWeaker forces of attraction.
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Particles are close together but can move past each other at slow speeds in random directions.
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Contain more energy than a solid. - 8Kinetic Theory GasesAlmost no forces of attraction
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More energy than particles in a liquid.
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Move around at high speeds in random directions. - 9—