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Joined 3 months ago
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Cake day: March 10th, 2026

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  • Sulphuric Acid acts on trousers and carpets. Wooden desks seem remarkably immune.

    Found out after getting an actual chemical and chemistry set from a deceased relative. Parents didn’t check what was in it, just “chemistry is educational, good he’s learning”.

    I was either dropping magnesium or potassium into a beaker of sulphuric acid as both of them were in the set too. And I was either a butterfingered lummox, or the act of dropping the metal into unbalanced the beaker knocked it over and the sulphuric acid cascaded onto my jeans eating through them and making my leg itchy, and bubbling the carpet into a stinky white then grey foam. I can still picture-ish that sight; and I’m normally not very visually minded, a testament to the deep impression the experience left on me.

    Was much more sensible after that: just burning magnesium and chucking potassium into tub of water in the garden like you do in Chemistry class from time to time.






  • Semjeza@fedinsfw.apptoScience Memes@mander.xyzSystems theory
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    2 months ago

    Other guy did a good job on the main points, but I’ll add something I saw in a study on a kind of bird in the US:

    The birds realised cigarette butts had an antibacterial effect, and made efforts to collect and use cigarette butts in their nest building for eggs and chicks.

    Learning and making use of novel materials.



  • The arbitrary cutoff size being to ensure continuity of the scientific consensus in popular awareness when I was a child isn’t a stupid rule.

    Not even when a larger kuiper belt object is found.

    Not even, when since mass is the primary means of estimating size until we fly a probe out there, we estimate a smaller but much with much more mass object to be larger and we debate a 10th planet yet again.