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Energy (power (power - the rate at which energy is transferred or the rate…
Energy
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conservation of energy
energy can be transferred usefully, stored or dissipated but cannot be created or destroyed
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when energy is transferred not all energy is transferred usefully into the store it should, some energy is always dissipated
energy stores
- thermal energy
- kinetic energy
- g.p.e energy
- elastic potential energy
- chemical energy
- magnetic energy
- electrostatic energy
- nuclear energy
energy is transferred :
- electrically
- mechanically (by a force doing work)
- heating
- radiation (light or sound)
efficiency
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you can improve efficiency of energy transfers by insulating objects, lubricating them or making them more streamlined
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a system means an object or a group of objects and when a system changes, energy is transferred
specific heat capacity - the amount of energy required to raise the temperature of 1kg of a material by 1 degrees