physics 1

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  • Created by: Aurora H
  • Created on: 19-05-16 19:13
what is heat ?
a form of energy and is measured in joules
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what is temperature ?
shows how hot or cold an object in measured in celcius
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what is a thermogram ?
to show how hot an object is throught coulours ?
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what is specific heat capacity ?
the amount of energy which is needed to raise the temp of 1 kg of material
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what is specific latent heat ?
The amount of energy needed to change the state 1 kg of material
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what are changes of state ?
the amount of energy to change a solid to a liquid to a gas
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what are thermal conductors ?
a metel which can conduct head very well
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what is conduction ?
Energy is transferred throught solid material
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what are thermal conducters ?
matererials which dont conduct heat very well
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what is convection ?
when moving particles carry energy from one place to another
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what is infrared radiation ?
this is energy is being transfered by radiation
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what is pay-back time ?
the amount of time it takes to recover the money spent
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what is a sankey diagram ?
to show the energy transferred made by a application
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what is applitude ?
maximum height of the wave measured fromthe middle
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what is wavelength ?
short distance between one point and the same point on the next wave
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what is the electromagnetic spectrum ?
radio wave , microwaves , infrared , visible , ultraviolet , x rays and then gamma rays
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what are optical fibres ?
very fine glass cables which are used to transmit data
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what are the uses of optical fibres ?
endiscopes , lights and for transmitting lots of data (a multiplex )
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what are lasers used for ?
surgery , dental , dvd and cutting materials
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what is the wavelength of a microwave ?
long wavelegth
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what type of wave does a mobile phone use ?
microwaves for communication
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what are the advantages of didgital radios
more stations , less chance of interferace
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what are the disadvantage of DAB ?
areas of the UK covered , not as good as FM
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what use wireless communication ?
televisions , mobile phone , laptops and smart phones
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what do radio waves refect off ?
the ionisphere
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what can p-waves do ?
travel throught the solid and liquid parts of the earth
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what can s-waves do ?
they can pass throught solid parts of the earth
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what are SPF's ?
sun protection factor
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what type off communication with light ?
morse code
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how do microwaves cook food ?
by penertrating 1 cm into the food and cooks the water molecules
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Other cards in this set

Card 2

Front

what is temperature ?

Back

shows how hot or cold an object in measured in celcius

Card 3

Front

what is a thermogram ?

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 heat ?

Back

Preview of the front of card 5
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