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The percentage ratio of energy produced to energy supplied to a system; or a measure of minimum energy required relative to energy actually consumed; or a measure of relative energy consumed to provide the same energy service.
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Shall I boil water with a water boiler (cooker) or with a pot?
Operating one cooking appliance would be more efficient.
Using your two-pot method, to maintain the boiling water once it is transferred to the cooking pot, you'll have to first bring that cooking p …