Open Menu
AllLocalCommunitiesAbout
lotide
AllLocalCommunitiesAbout
Login

Alpha decay go brrrrrrr

⁨707⁩ ⁨likes⁩

Submitted ⁨⁨3⁩ ⁨weeks⁩ ago⁩ by ⁨fossilesque@mander.xyz⁩ to ⁨science_memes@mander.xyz⁩

https://mander.xyz/pictrs/image/5e38a2bd-d67d-4afd-84b8-7bd4428d48d7.jpeg

source

Comments

Sort:hotnewtop
  • quediuspayu@lemmy.dbzer0.com ⁨3⁩ ⁨weeks⁩ ago

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

    source
    • slaneesh_is_right@lemmy.org ⁨3⁩ ⁨weeks⁩ ago

      Thanks but i find an annual calendar already pretty overwhelming

      source
  • skisnow@lemmy.ca ⁨3⁩ ⁨weeks⁩ ago

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

    source
  • hperrin@lemmy.ca ⁨3⁩ ⁨weeks⁩ ago

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

    source
    • xx3rawr@sh.itjust.works ⁨3⁩ ⁨weeks⁩ ago

      Somebody touch-a my U235

      source
    • SaharaMaleikuhm@feddit.org ⁨3⁩ ⁨weeks⁩ ago

      Just eat the lead to make all the worries disappear

      source
    • ThrowawayPermanente@sh.itjust.works ⁨3⁩ ⁨weeks⁩ ago

      Whose responsible this?!?!

      source
  • Iron_Lynx@lemmy.world ⁨3⁩ ⁨weeks⁩ 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.

    source
    • sga@piefed.social ⁨3⁩ ⁨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

      source
      • Iron_Lynx@lemmy.world ⁨2⁩ ⁨weeks⁩ ago

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

        source
  • notabot@piefed.social ⁨3⁩ ⁨weeks⁩ ago

    Woahhh. That's heavy maaannn.

    source
    • AtariDump@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

      Image

      source
  • cryoistalline@lemmy.ml ⁨3⁩ ⁨weeks⁩ ago

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

    source
    • Zuriz@sh.itjust.works ⁨2⁩ ⁨weeks⁩ ago

      1 hour here is 7 years on earth .jpg

      source
  • Maroon@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

    No snoot, there’d be crabs!!

    This meme is false.

    source
  • jawa22@lemmy.blahaj.zone ⁨3⁩ ⁨weeks⁩ 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.

    source
    • zorblitz@mander.xyz ⁨2⁩ ⁨weeks⁩ ago

      What’s invar?

      source
      • jawa22@lemmy.blahaj.zone ⁨2⁩ ⁨weeks⁩ ago

        en.m.wikipedia.org/wiki/Invar

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

        source
        • -> View More Comments
  • ChicoSuave@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

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

    source
  • klemptor@startrek.website ⁨3⁩ ⁨weeks⁩ ago

    Awww greyhound snoot 😍

    source
  • guthibnet@lemmings.world ⁨2⁩ ⁨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…

    source