pphysics
- Created by: hattie townsend
- Created on: 09-03-16 15:45
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- P1.1 - Energy Transfer
- Infrared Radiation
- The transfer of heat energy by electromagnetic radiation
- The hotter an object is, the more infrared it gives out
- The amount of infrared an object emits or absorbs depends on its surface, shape and dimensions
- Objects emit and absorb radiation faster if there is a bigger difference between it and its surroundings
- Dark, matt surfaces:
- emit more than light, shiny surfaces
- absorb more than light, shiny surfaces
- Kinetic Theory
- Explains the different states and properties of matter
- When the temperature increases: the gas molecules move faster and collisions become more intense
- Atoms that make up a gas are always moving
- When the temperature falls: the gas molecules move slower, the molecules move closer together, there is less collisions, the gas forms a liquid
- Eventually, the liquid becomes a solid. The atoms in a solid can only vibrate about a fixed point
- Explains the different states and properties of matter
- Energy Transfer by Heating
- Involves the movement of particles. This can be undertaken by a variety of m echanisms including
- Conduction, Convection, Evaporation, Condensation
- Involves the movement of particles. This can be undertaken by a variety of m echanisms including
- Infrared Radiation
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