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If Uranium-238's half life is 4.5 billion years, can we then assume that all Uranium-238 on earth has reached half life?

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  • If Uranium-238's half life is 4.5 billion years, can we then assume that all Uranium-238 on earth has reached half life?


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... to decay is called the half-life. Half-lives of ... has a half-life of 4.5 billion years. ... found on earth (in Greenland) was dated 3.7 billion ...
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Positive: 85 %
Decay & Half Life. Why is this chapter ... we can accurately predict when one-half of them have decayed, ... has a half-life of 4.5 billion years.
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Positive: 82 %

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How old is the Sun? ... (four and a half billion) years ago and we expect it to carry on pretty much as ... We assume that they are all basically the ...
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Positive: 85 %
Define half-life. half ... The half-life of a substance does not equal half of its full ... whose half-life is 4 minutes, then after 4 minutes only ...
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Positive: 80 %
... universe of only 1.8 billion years. Rocks on earth were then already known ... be 4.5 billion years], ... of half uranium 238 and ...
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Positive: 66 %
The planet is around 4.5 billion years old, and life appeared on its surface around 3 ... Earth has a natural ... We all know the Earth spins round ...
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Positive: 43 %

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