Special classes of semigroups: Difference between revisions

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When calculating the unstable fraction of the [[radioactivity]] in the original [[isotope]] [[Atomic nucleus|nucleus]], there is a simple equation which can help you find the fraction of unstable nuclei still [[radioactive]] after a given period of half-lives.
 
== Equation ==
 
<math>p=1/2^n</math>
 
when <math>p</math> is the fraction of unstable nucleus, and <math>n</math> the number of half lives.
 
'''''Example:'''''
 
'' '''Q:''' The Half Life of [[Cobalt-60]] is 5 years. After 225 years, what fraction of the [[Cobalt-60]] is still unstable?''
 
'''''A:''' (225÷5=45 will find you the number of half lives.)''
''<math>p=1/2^n</math>''
''<math>p=1/2^{45}</math>''
 
{{DEFAULTSORT:Radioactive Instability in the Nucleus - Formula}}
[[Category:Radioactivity]]

Latest revision as of 21:37, 16 November 2014

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