p1

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Name the stored types of energy
Gravitational, Nuclear, Elastic, Chemical, Thermal
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Name the types of energy in action
Kinetic, Sound, Light, Thermal
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Can energy be created or destroyed?
no
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Can energy change state?
Yes
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What unit is energy measured in?
Joules
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What unit is power measured in?
Watts
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What is power?
The rate of energy transfer
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Name the fossil fuels
Coal , Oil, Gas
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What are the advantages to fossil fuels?
Easily obtained, In abundance
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What are the disadvantages of fossil fuels?
None renewable, Running out, Produces CO2
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What are the advantages of nuclear fuels?
Produce less CO2, Way more efficient than Fossil fuels (x10000)
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What are the disadvantages of nuclear Fuels?
Nuclear waste, non renewable
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What are the advantages of Bio Fuels?
Renewable, Carbon Neutral
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What are the disadvantages of Bio Fuels?
Take up farm land, Not very efficient (little energy)
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What are wind turbines?
A tall tower with a turbine being turned by the wind
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What is Wave power?
A wave pushing a float on an axle to generate electricity
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What is hydroelectricity?
Water running downhill and turning a turbine
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What is tidal power?
Trapping a high tide and turning turbines
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Why is Nuclear fuel better than fossil fuel?
Produces 10000 times more energy, No greenhouse gasses, 1000000kwh per 1 kg
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Why are fossil fuels better than nuclear fuel
No radioactive waste, Not as dangerous to handle, waste doesnt take up lots of space, no half life
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How does hydroelectricity work?
Uses GPE stored in water
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How does geothermal energy work?
Uses heat from the earths crust to boil water into steam to turn a turbine
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What are the disadvantages of geothermal energy?
Can only be done where the earths crust is thin, expensive
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What is the national grid?
A network of cables and transformers that distributes electricity
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Why are overhead cables better?
Less health risks and is easier to repair if broken
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What are the disadvantages of overhead cables?
Eye sore, greater chance of electrical shock, affected by weather
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Why do step up transformers increase voltage and decrease current?
As to minimize energy loss a high voltage is required to maintain a low current
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What direction do transverse waves move?
Perpendicular to the direction of energy flow
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List some examples of transverse waves
Light, water waves, siesmic waves
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Which way do longitudinal waves transfer move?
Parallel to the energy transfer direction
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What is rarefaction in longitudinal waves?
Where the parallel waves are spread out
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What is compression in longitudinal waves?
where the parallel waves are compressed together
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What is frequency?
The number of cycles per second
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What will the angle of incidence always equal?
Angle of reflection
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What is refraction?
When light travels through media with different densities which may cause it to change speed and direction
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What is the refractive index?
How much light will be refracted by the substance
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What is convection?
The transfer of heat in liquids and gasses
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What happens if the particles are hotter?
They move around quicker and are less dense meaning they rise
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What is conduction?
How heat energy is transferred through solids when they are heated
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What happens when conductors are heated?
The atoms gain more energy and vibrate, causing them to collide more and transfer energy
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What are light shiney surfaces good for?
Reflecting of infra red radiation
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What are Black (Dark, matt) surfaces good for?
Absorbering and good emitters of infra red radiation.
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What are the properties of solids?
Have strong bonds between atoms and are rigid in an ordered structure
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What are the properties of liquids?
Have weaker bonds and are not in an ordered structure and are able to move postions
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What are the properties of gasses?
No bonds between atoms and are able to move freely
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What is evaporation?
When a liquid changes into a gas.
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How can you speed up evaporation?
Increase SA, Warm up, add more wind
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What is condensation?
When a gas turns into a liquid
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What is u-value?
A way to measure how good a material is at insulating, the lower the better
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What is payback time?
The time needed to save as much as it cost
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What is start up time?
Time it takes for a power station to start producing electricity
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What speed do the electromagnetic spectrum waves travel at in a vacuum?
The same speed
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What are radio waves used for?
TV and radio
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What are microwaves used for?
Communication and satellites
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What is infrared red waves used for?
Remote controls
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What is diffraction?
When a wave spreads out after going through a gap
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What is red shift?
The relative movements of wave depending on there postion in relativity to the observer
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What happens if the source is moving towards you?
The wavelength is shorter
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What happens if the source is moving away from you?
The wavelengths feel longer
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Other cards in this set

Card 2

Front

Name the types of energy in action

Back

Kinetic, Sound, Light, Thermal

Card 3

Front

Can energy be created or destroyed?

Back

Preview of the front of card 3

Card 4

Front

Can energy change state?

Back

Preview of the front of card 4

Card 5

Front

What unit is energy measured in?

Back

Preview of the front of card 5
View more cards

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