Physics: P1- Energy Transfer By Heating

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What do all objects emit?
Infrared Radiation
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What surfaces are good absorbers and emitters?
Dark, matt surfaces
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What surfaces are god reflectors?
Light, shiny surfaces
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What state does conduction occur in?
Solids
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What do metals have that helps to conduct well?
Free moving electrons
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What are poor conductors called?
Insulators
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What does convection occur in?
Fluids (liquids and gases)
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What transfers the energy?
Convection Current
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What increases the rate of evaporation?
Surface area, temperature and draught
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What increases the rate of condensation?
Surface area and reducing surface temperature
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What increases energy transfer?
temperature difference
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What does a flask have to insulate?
plastic cap, double walled glass, plastic cover, inside surfaces are silver and vacuum
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What is the equation for specific heat capacity?
E = m x c x theta
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What do they stand for?
Energy in J, Mass in kg, specific heat capacity in J/kgdegreeC and temperature change in degrees C
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What is used for insulation in a house?
Fibreglass loft insulation, cavity wall insulation, double glazing, draught proofing aluminium foil
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What is a U-value?
How much energy per second passes through.
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What is the rule for a U-value?
The lower the U-value, the better the material is at insulating
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Card 2

Front

What surfaces are good absorbers and emitters?

Back

Dark, matt surfaces

Card 3

Front

What surfaces are god reflectors?

Back

Preview of the front of card 3

Card 4

Front

What state does conduction occur in?

Back

Preview of the front of card 4

Card 5

Front

What do metals have that helps to conduct well?

Back

Preview of the front of card 5
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