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26 Cards in this Set
- Front
- Back
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Infrared |
All objects emit infrared Hotter the object=more infrared |
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States of matter |
Solid , liquid , gas |
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Good absorbers of radiation ? |
Dark, matte surfaces |
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Good reflectors of radiation ? |
Light , shiny objects |
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Where does conduction happen ? |
Mostly in solids |
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What are poor conductors called ? |
Insulators |
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U value |
Lower the u value the better the material is an insulator |
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Where does Convection mostly happen ? |
In fluids ( gas and liquid ) |
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What effects rate Evaporation ? |
- increasing surface area of liquid - increasing temp |
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Rate of condensation : |
Increasing the surface area Reducing surface area |
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What slows down the rate of heat capacity? |
The greater mass of an object , the more slowly its temp increases when it is heated |
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forms of energy |
Light Sound Kinetic Nuclear Gravitational Elastic Chemical |
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What is power ? |
The rate at which it transfers energy |
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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 savings |
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What are fossil fuels ? |
Coal , oil, gas |
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What is a biofuel ? |
Is any fuel obtained from living or recently living organisms |
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How can we get energy from wind and water ? |
We can use energy from wind and water to drive turbines directly |
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How does a hydroelectric power station work ? |
Water is collected in a reservoir , this water is allowed to flow downhill and turn turbines at the boom of the hill |
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What is wave power , |
Use movement of the waves on the sea to generate electricity |
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What is tidal power ? |
Level of sea rising and falling twice a day used to drive turbines |
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What is geothermal energy? |
It comes from inside the earth |
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What direction to transverse waves travel ? |
The vibration of particles is perpendicular to the direction in which the wave travels |
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What direction do longitudinal wave travel ,? |
Parallel to the direction of the travel of the waves |
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Electromagnetic spectrum ? |
Radio Microwaves Infrared Light Uv X rays & gamma |
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What is blue shift ? |
Indicates that a galaxy is moving towards us |
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What is red shift ? |
Indicates galaxy is moving further away |
