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Unit one physics
Fichas del conjunto (10)
- 1Which surface colour absorbs and emmits infra-red energy?Dark, matt surfaces are the best absorbers and emmiters
- 2Which surface colour is the best for reflecting?Light, shiny surfaces are the best at reflecting.
- 3What materials are the best conductors?Metal is the best conductor
- 4Why is metal the best conductor?Metal is the best conductor because this material contains free electrons which, when they get energy, travel freely and bump into ions faster than in a non-metal.
- 5What is convection?convection happens when we heat a fluid. The hot fluids rise up because they are less dense, but when the fluid becomes cooler it becomes less dense and descends and then is attrached back to the heat therefore a cycle is created called convection
- 6How do we you find out the speed of a wave?You find out the speed of a wave by doing the frequency(Hz) X the wavelength (meters).
- 7How do you find out the frequency?You find out the frequency by dividing the wavelength (m) by the speed (m/s)
- 8How do you find out the wavelength?you find out the wavelength by doing the frequency (Hz) divided by the speed (m/s)
- 9What is the perpendicular line to the mirror called?This line is called the normal.
- 10Is the angle of incidence the same as the angle of reflection?Yes
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- Fichas sobre Unit one physics, creado por tjh4567 el 11/06/2014.
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