P1 - Unit 1

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What is infrared radiation?
Energy transfer by electromagnet waves.
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What absorb infrared radiation quickest?
Dark and matt surfaces.
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What effects the rate of energy transfer?
The shape, size, type of material, temperature difference between the object and it's surroundings.
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What are the different forms of energy?
Light, sound, kinetic, nuclear, electrical, gravitational potential, elastic potential and chemical.
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How can you make machines more efficient?
Reducing friction, air resistance, electrical resistance and noise due to vibrations.
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What is payback time?
The time it takes for an appliance or installation to pay for itself in terms of energy.
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What are transverse waves?
Waves that oscillate perpendicular to the direction of travel, e.g. electromagnetic waves
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What are longitudinal waves?
Waves that oscillate parallel to the direction of travel, made up of compression and rarefractions, e.g. sound waves;
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What waves are used for communication?
Light, infrared, microwaves and radio waves.
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What radiation was created after the 'Big Bang'?
Cosmic microwave background radiation.
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Other cards in this set

Card 2

Front

What absorb infrared radiation quickest?

Back

Dark and matt surfaces.

Card 3

Front

What effects the rate of energy transfer?

Back

Preview of the front of card 3

Card 4

Front

What are the different forms of energy?

Back

Preview of the front of card 4

Card 5

Front

How can you make machines more efficient?

Back

Preview of the front of card 5
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