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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Discussions,projects,campaigns, and events to support victims of cyber bullying are crucial to making cyber bullying stop. They help raise awareness of the subject to help those that are victims of cyber bullying.
Reasoning - Your best bet and term to describe the evolution by natural selection is theory as to still scientific theory/research is still ongoing and changes can be made in a different direction.