Nuclear energy does not produce electricity on its own. The nuclear energy it produces is used to heat water . The hot water then turns to steam that is used to turn dynamo turbines. This is thermal energy turned to mechanical energy. The dynamo turbines turn the mechanical energy into electric energy.
Nuclear energy lasts longer because the same volume as compared to fossil fuels produced a larger magnitude of energy, million of magnitudes larger. Therefore with the controlled release of this enormous energy, nuclear energy can last much longer than fossil fuels.
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The main difference between homologous structures and vestigial structures is that homologous structures are the similar anatomical structures inherited from a common ancestor whereas vestigial structures are the anatomical structures which have reduced their size as they are no longer used.
The population would decrease because the high death rate and low other rates would lead to more deaths than births, and not many other people would be entering the country/place, so the population would decrease
