Physics unit 1- energy for the home

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What is temperature?
The temperature of an object tells us how hot or cold something is. It is measured in degrees celcius. It doesn't tell us how much heat is contained in an object.
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What is heat?
Heat is a form of energy measured in joules.
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What is a thermogram used for?
It is used to show hot hot an object is. You can take a picture using a camera. (hot=white, red, yellow, green and light blue, cold=dark blue).
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What is specific heat capacity?
The amount of energy (joules) needed to raise the temperature of 1kg of an object by 1 degree.
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What is specific latent of heat?
The amount of energy (joules) needed to change the state of 1kg of a substance.
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What is Specific latent heat of fusion?
Used for melting a substance.
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What is specific latent heat of vaporisation?
Used for boiling and/or evaportating a substance.
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What is infrared radiation?
The transfer of energy by electromagnetic waves.
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What is payback time?
The time it takes to pay back the insulation.
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What does a sankey diagram show?
The energy transfers made by an appliance.
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What are optical fibres?
Very fine glass cables that can be used to transmit large amounts of information.
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What is a laser?
A more modern use of light. They produce a narrow beam of light across a long distance.
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What are microwaves? (Used in ovens)
Another type of electromagnetic wave.
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What is the ozone layer?
A thick layer of gas around the entire Earth. It protects the Earth from the highest energy ultraviolet radiation.
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Other cards in this set

Card 2

Front

What is heat?

Back

Heat is a form of energy measured in joules.

Card 3

Front

What is a thermogram used for?

Back

Preview of the front of card 3

Card 4

Front

What is specific heat capacity?

Back

Preview of the front of card 4

Card 5

Front

What is specific latent of heat?

Back

Preview of the front of card 5
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