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13 Cards in this Set
- Front
- Back
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Energy Stores |
Gravitational potential Chemical Solar Electrical
Kinetic
Light
Thermal
Elastic potential/Electrostatic
Magnetic |
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Work done |
Force x Distance
Another way of saying energy transferred |
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Kinetic energy store |
Anything with movement has energy in its kinetic energy store
Ek = 1/2mv2 |
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Gravitational potential energy store |
Ep = mgh
Lifting an object transfers energy to the gravitational potential energy store
Falling objects transfers energy from its gravitational potential store to its kinetic energy store |
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Elastic potential energy store |
Ee = 1/2ke2
Stretching/Squashing an object can transfers energy to the elastic potential energy store
as long as the limit of proportionality has not been exceeded |
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Specific Heat Capacity |
The amount of energy needed to raise the temperature of 1kg of a substance by 1°C |
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Conservation of Energy and Power |
Energy can be transferred, stored or dissipated but never created or destroyed |
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Power |
Rate of Energy Transfer
P= E/t P= W/t |
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Conduction |
Process where VIBRATING PARTICLES TRANSFER ENERGY to NEIGHBOURING PARTICLES
Occurs mainly in solids |
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Convection |
Where energetic particles MOVE AWAY from HOTTER to COOLER REGIONS
Occurs in only liquids and gases |
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Insulation |
Reduce the rate of energy transfer by heating
•Thick walls made from low thermal conductivity material •Thicker walls, slower rate of energy transfer
•Loft insulation •Double glazed windows |
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Efficiency |
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Biofuels |
Renewable energy sources created from either plant products or animal dung |
