Sometimes other signs and symptoms precede sudden cardiac arrest. These may include fatigue, fainting, blackouts, dizziness, chest pain, shortness of breath, weakness, palpitations or vomiting. But sudden cardiac arrest often occurs with no warning.
In the core of nuclear reactors, the fission of uranium atoms releases energy that heats water to about 520 degrees Farenheit. This hot water is then used to spin turbines that are connected to generators, producing electricity.
-A nuclear reaction is a chain reaction occurs when a Uranium atom splits and two different reactions occur: either it is an atomic bomb, which happens when an atom splits in a split second, or, in a nuclear power reactor, which is much more controlled and cannot explode like a bomb.