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Happens every time (lemmy.world)

submitted 15 hours ago by [email protected] to c/[email protected]

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[–] [email protected] 28 points 14 hours ago (6 children)

The lump would still have about 14% uranium still in it. (If my understanding of half-life is correct)

[–] [email protected] 14 points 14 hours ago (5 children)

Afaik its always going to have some parts of uranium right? 50% after one half life, 25% after two half lives and it will keep on halving practically forever (or till the last atom decays). In the end it comes down to when you consider it a negligible amount.

[–] [email protected] 10 points 11 hours ago

Yeah, thats what I was using to get 14%.

2billion years is about 2.8 halflives, so I calculated (1/2)^2.8 ~ 0.14.

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