Physics 1.1

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Notes on Physics 1.1
Becky.Hart
Flashcards by Becky.Hart, updated more than 1 year ago
Becky.Hart
Created by Becky.Hart over 9 years ago
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INFRARED RADIATION Heat radiation is the transfer of heat energy by IR. * IR can be emitted by solids, liquids and gasses. * All objects are emitting and absorbing IR. * IR is emitted from the surface of an object
INFRARED RADIATION If object is hotter than surroundings it emits>absorbs. (Cools down) * If object is cooler than surroundings it absorbs>emits. (Warms up) * The hotter an object is the higher the radiation in a given time.
INFRARED RADIATION IR is emitted from the surface of an object. * Temperature, colour and shininess of a surface affect how much IR is emitted.
INFRARED RADIATION Dark, matt surfaces absorb and emit more IR than light shiny surfaces. * Light, shiny surfaces reflect more IR making them great for reducing energy transferred by radiation
Kinetic Theory The particles are the same- only the energy and arrangement of the particles are different. * The movement energy is known as kinetic energy.
Kinetic Theory Solids Strong forces of attraction hold particles together in a regular/uniform arrangement. * Don't have much energy- can only vibrate about their fixed positions.
Kinetic Theory Liquids Weaker forces of attraction. * Particles are close together but can move past each other at slow speeds in random directions. * Contain more energy than a solid.
Kinetic Theory Gases Almost no forces of attraction * More energy than particles in a liquid. * Move around at high speeds in random directions.
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