Energy Conservation and Efficiency
Conservation of Energy and Wasted Energy
Energy cannot be created or destroyed, just transferred to other stores
Energy that is not usefully transferred is wasted, often this is dissipated to the surroundings: increasing their thermal store
Efficiency is the ratio of the increase in the useful energy store (output) to the energy in the original store (input). This can either be expressed as a number between 0 an 1, or as a percentage.
These are a great way to visualise the energy transfers in a device and therefore its efficiency.
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