Alpha decay go brrrrrrr

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• quediuspayu@lemmy.dbzer0.com ⁨1⁩ ⁨month⁩ ago

  Put that chunk of uranium on a scale and you have a 700 milion year calendar

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  • slaneesh_is_right@lemmy.org ⁨1⁩ ⁨month⁩ ago

    Thanks but i find an annual calendar already pretty overwhelming

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• hperrin@lemmy.ca ⁨1⁩ ⁨month⁩ ago

  GOD DAMNIT! Who touched my Uranium-235?? I left it RIGHT HERE where this lead is.

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  • xx3rawr@sh.itjust.works ⁨5⁩ ⁨weeks⁩ ago

    Somebody touch-a my U235

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  • SaharaMaleikuhm@feddit.org ⁨1⁩ ⁨month⁩ ago

    Just eat the lead to make all the worries disappear

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  • ThrowawayPermanente@sh.itjust.works ⁨5⁩ ⁨weeks⁩ ago

    Whose responsible this?!?!

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• skisnow@lemmy.ca ⁨5⁩ ⁨weeks⁩ ago

  Who measures uranium in pounds? I feel like if you’re not using metric you probably shouldn’t be handling uranium.

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• Iron_Lynx@lemmy.world ⁨1⁩ ⁨month⁩ ago

  So I ran the numbers. U-235 decays into Pb-207, which means about 12% of its mass is radiated away in alpha decay. Which sounds like a fuckton.

  Also, it’ll mean that that chunk of lead will be a touch heavier, at 13.2 lbs

  The Maths:

  U-235 decays into Pb-207. To three significant digits, 207/235 = 0.881, equivalent to 88.1%, meaning 11.9% is radiated away.
  88.1% of 15 lbs = 13.2 lbs.

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  • sga@piefed.social ⁨5⁩ ⁨weeks⁩ ago

    also, uranium's half life is 700 million years, so we expect (207/235)*7.5 (of lead) + 7.5 (uranium) ~ 14.106382978723405 lump.

    also, a lot of the helium produced will remain trapped inside (most heavy metal lumps act as sponges for little gasses). but 700 mil years is also a large amount of time, so much of it would diffuse out. I could checkup diffusion statistics for he d pb-u but i would have to probably do a double integral (as pb-u combination is not fixed, and we can not simply do the error function calculation), so skipping that. but it is safe to say that we will have a lump of ~50% U, 44% pb, and 6% He (by mass), and a significant amount of he will remain in

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    • Iron_Lynx@lemmy.world ⁨5⁩ ⁨weeks⁩ ago

      So it would be more accurate to say that 13.2 lbs would be a minimum for the lump’s mass.

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• notabot@piefed.social ⁨1⁩ ⁨month⁩ ago

  Woahhh. That's heavy maaannn.

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  • AtariDump@lemmy.world ⁨1⁩ ⁨month⁩ ago

    Image

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• cryoistalline@lemmy.ml ⁨1⁩ ⁨month⁩ ago

  u-235 has a half life of 704 million years. only half of it would have decayed.

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  • Zuriz@sh.itjust.works ⁨5⁩ ⁨weeks⁩ ago

    1 hour here is 7 years on earth .jpg

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• Maroon@lemmy.world ⁨5⁩ ⁨weeks⁩ ago

  No snoot, there’d be crabs!!

  This meme is false.

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• jawa22@lemmy.blahaj.zone ⁨1⁩ ⁨month⁩ ago

  Reminds me of my ingot of invar. Every fee years I try to think of something to do with it, but still haven’t come up with anything.

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  • zorblitz@mander.xyz ⁨5⁩ ⁨weeks⁩ ago

    What’s invar?

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    • jawa22@lemmy.blahaj.zone ⁨5⁩ ⁨weeks⁩ ago

      en.m.wikipedia.org/wiki/Invar

      In short, it is an alloy that experiences almost zero thermal expansion or contraction.

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• ChicoSuave@lemmy.world ⁨1⁩ ⁨month⁩ ago

  So a chunk of lead today could have been pre-cambrian uranium?

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• klemptor@startrek.website ⁨5⁩ ⁨weeks⁩ ago

  Awww greyhound snoot 😍

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• guthibnet@lemmings.world ⁨5⁩ ⁨weeks⁩ ago

  Ayo nothing special here but if you’re a Unity / Python Coder and get stuck and search for answers, you’re probably familiar with:

  https://guthib.net/

  and no, not github. Just see what happens…

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