Physics Unit 1 Energy Transfer By Heating

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Dark, Matt Surfaces
Emit & Absorb Infrared Radiation The Best
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Light, Shiny Surfaces
Reflect Infrared Radiation The Best
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Solid
Particles, tightly packed together. Vibrate around a fixed position.
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Liquid
Particles, still attached together, can move about freely.
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Gas
Particles are free and can randomly move in any direction.
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Conduction
Occurs mainly in solids. If one end is heated, then the particles gain more kinetic energy and vibrate more. This energy is transferred to the other particles.
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Convection
Occurs in fluids. When a fluid is heated it expands and becomes less dense and rises upwards. When this happens, the cooler, denser fluid comes underneath and replaces it.
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Evaporation
When a liquid is heated, the most energetic molecules leave the surface and become a gas.
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Condensation
When a gas comes into contact with a colder surface it turns back into a liquid.
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Energy Transfer By Design
Energy transfer increases when the temperature change increases also.
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Specific Heat Capacity
The amount of energy required to raise the temperature of 1kg of something by 1°C
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U-Value
Tells us how much energy can pass through a substance in a second. Gives an indication of how good a substance is an insulator.
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Card 2

Front

Reflect Infrared Radiation The Best

Back

Light, Shiny Surfaces

Card 3

Front

Particles, tightly packed together. Vibrate around a fixed position.

Back

Preview of the back of card 3

Card 4

Front

Particles, still attached together, can move about freely.

Back

Preview of the back of card 4

Card 5

Front

Particles are free and can randomly move in any direction.

Back

Preview of the back of card 5
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