• mhague@lemmy.world
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      4 天前

      This is kinda funny. It’s like “Jesus was a white guy” mixed with “cis whites need to check their privilege”

      The idea that you could go back in time as a nutritionally giant white guy speaking gibberish and fit in because white is a bit anti history.

      If we’re sending people back in time it’s going to be Dwayne Johnson.

    • RememberTheApollo_@lemmy.world
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      4 天前

      Go back to a time where material quality and manufacturing processes couldn’t produce consistent quality and quantity of things needed to build a basic generator.

      Where will you get the permanent magnet, for instance? What will you demonstrate once you’ve assembled a basic generator? Going to make a light bulb? How about a voltage regulator? Think about the manufacturing processes involved in that, like pulling a vacuum for the bulb? I mean, it’s one thing to know that spinning a magnet in a coil of wire makes electricity, it’s an entirely different thing to actually build such a thing correctly and to convince ancient peoples to even help you and not kill you for witchcraft or something.

      • absentbird@lemmy.world
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        4 天前

        Copper and lodestone were some of the first materials refined from ores. You can also create a permanent magnet by getting a piece of iron struck by lightning.

        Once you have copper and a magnet you can use the electricity to make additional magnets out of iron.

        It’s also possible to make a magnet with a compass, a piece of iron, and a striking hammer:

        position the metal facing north, strike the southern end repeatedly

    • MBech@feddit.dk
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      4 天前

      Most people tend to forget stuff that isn’t important to them in their daily lives.

  • Pika@rekabu.ru
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    4 天前

    Just about everyone will be successful at some things.

    Everyone knows how to make:

    • Fire
    • Lever
    • Wheel
    • Clay blocks
    • Penicillium molds (antibiotics!)
    • Wine
    • Flatbread
    • Can work out a very basic steam turbine (pot+wheel)

    Quite a few also know how to make:

    • Bellows and basic forgery tools
    • Various simple fabrics
    • Simple water pumps
    • Simple carts, bicycles
    • Galvanic cells, or maybe even alternating current sources (+wheel=hydro/steam power!), incandescent light bulbs
    • Cheese and regular bread
    • Beer, cider, moonshine
    • Soap

    You can also teach them the basics of proper hygienic procedures to keep their food safe, their hands free of pathogens, etc.

    • Barbecue Cowboy@lemmy.dbzer0.com
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      4 天前

      Oh man, have you met an everyone? I might be pessimistic, but I think you might be overestimating by quite a bit. A lot of people know how those things work, but knowing enough to replicate even basics feels kinda rare. Even fire, most don’t know beyond ‘rub two sticks together’.

    • ssillyssadass@lemmy.world
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      4 天前

      However, if you end up in a Christian land, you’ll be seen as a heretic or sorcerer and burned at the stake before you get the chance to try any of these.

    • Potatar@lemmy.world
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      4 天前

      I feel like unless you can make everything yourself, logistics would be a problem:

      -Bring me Potassium Nitrate

      • He is speaking in tongues, kill him!
  • skisnow@lemmy.ca
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    4 天前

    Me at the 19thC Royal Society, all cocky like: Matter is energy, E=mc^2

    Michael Faraday: interesting, how would I go about proving that?

    Me: no fucking clue. Something to do with spaceships, or massive bombs?

    • Pika@rekabu.ru
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      4 天前

      Go take a piece of uranium ore (they knew what uranium is), spin it up real fast, and collect separate fractions depending on how close they were to the wall.

      Now, accumulate plenty of that lighter thing far from the wall, something like 50 kg, bake it in a sphere, and throw it in the water somewhere far from other people. Water will start boiling - this is energy released. After it stops boiling (this will take quite a while) measure the weight of the sample - it will be lighter.

      The energy released is directly related to the mass lost, and they relate to one another through this equation. If you manage to condense steam back to water and analyze it through any means available at the specific point of 19th century, you’ll be able to show that the mass lost is greatly higher than the mass of uranium dispersed in steam. Through this, you can prove it is the mass that converts to energy. The results may not be accurate to ascertain the dependence is exactly speed of light squared, but you’ll make a point for further research.

      • skisnow@lemmy.ca
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        4 天前

        I’m fairly sure that “spin up a piece of uranium ore” is covering a ton of stuff that you’d have to Google (and possibly get put on a list for).

        • Pika@rekabu.ru
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          4 天前

          Sure enough, that would help to make it much better and more reliable, but overall, this is really all you need. Centrifuge that thing, try not to die, and you’ll have a basic nuclear fuel.

          Now, to make a good nuclear fuel in large quantity, let alone make weapon-grade uranium most folks are actually concerned about, you need a much better machinery, and this is what three-letter agencies are on the lookout for.

          To put into perspective how easy it is to start a “just to make a point” nuclear fission if you have uranium available: there are signs that some natural uranium deposits effectively served as nuclear reactors, generating up to 100kW of heat.

          https://en.wikipedia.org/wiki/Natural_nuclear_fission_reactor

          • skisnow@lemmy.ca
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            3 天前

            this is really all you need. Centrifuge that thing

            See that just makes me think you’re imagining tossing a rock into a spinny thing, which I’m fairly sure isn’t right. You need to do something to make it gaseous first, but I’ve no idea what.

            • Allero@lemmy.today
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              3 天前

              No, obviously it’s not THAT easy. But, again, can be done.

              Gaseous uranium hexafluoride is obtained through sublimation at conditions that are reachable with old tech.

              And overall, even natural uranium can be used, you’ll just need a lot of it and it won’t cause a chain reaction, but rather a set of small individual reactions. But the water will heat up somewhat. Also, you don’t necessarily have to go with uranium specifically if you’re not sure you’ll make it work.

              • skisnow@lemmy.ca
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                3 天前

                Gaseous uranium hexafluoride is obtained through sublimation at conditions that are reachable with old tech.

                Either you googled that, or your level of knowledge is very much not representative of most people’s. Either way it doesn’t meet the implicit conditions of the meme.

      • Alcoholicorn@mander.xyz
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        4 天前

        spin it up real fast, and collect separate fractions depending on how close they were to the wall.

        btw don’t die of fluorine poisoning. Also build hundreds of high-speed centrifuges that are resistant to UF6.

        • Pika@rekabu.ru
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          4 天前

          Gears + a lot of slaves = there you go.

          Cruel, but you gotta use what you have to make it all work.

  • Jankatarch@lemmy.world
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    4 天前

    Y’all don’t give yourselves near enough credit for what sounds “common sense” to you.

    It would look more like this.

    (Click image if resolution too low)

    • skisnow@lemmy.ca
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      4 天前

      The reaction in that picture is also bang-on though, because Semmelweis got a huge amount of pushback from the medical community at the time, who took offense at the apparent accusation that they were so dirty they were killing their own patients.

  • Gorilladrums@lemmy.world
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    4 天前

    I’m pretty sure there was research done that showed that people who are hypothetically transported back in time, won’t be able to make any meaningful contributions to the era they go to. They will just end up integrating in that the society of that era.

    Basically if you go back in time to medieval Europe, you could introduce something like paperclips to society, but you won’t be able to introduce things like computers even if you know how they work and how to use them.

    • DragonTypeWyvern@midwest.social
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      4 天前

      For a really easy demonstration of why, look at videos of WW2 era production machinery.

      They are often amazingly, fascinatingly complex masterpieces of engineering that are still the result of generations of combined mechanical effort and discovery, and what we have now is as far above them as they are above a printing press. And building them required complex tools built by other, slightly less complex tools, you’re not going right from anvil and hammer to a T-model production line.

      You might be able to start the scientific revolution early and introduce key concepts but you do not know how to build even a 19th century cannery, much less a computer, and the team of engineers it would take to do it doesn’t exist either.

  • Atomic@sh.itjust.works
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    5 天前

    Electricity works by moving electrons from point a to point b.

    There are different ways of acomplishing this. Easiest is to have an electrolyte between zinc and copper. Kids use a potato for their science class. Volta used cloth soaked in saltwater.

    Which is also why call it “Volt” and “Voltage”

    • Pika@rekabu.ru
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      4 天前

      Got galvanic power source? Wrap the coil around a piece of iron/cobalt/nickel and blast power at that stuff. After a while, you’ll get a magnet.

        • Pika@rekabu.ru
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          4 天前

          You can cast a basic draw plate with regular forms. It won’t be good, and the wires made with it will be terrible by any modern standards, they will also break more easily, but it will get the job done.

          Then you heat up fine copper or silver (both can be obtained since ancient times), roll it to a thin wire-like structure, heat it up again and put it through the draw plate. Yay, you got a wire!

          • drath@lemmy.world
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            4 天前

            Correct me if I’m wrong, but wouldn’t that be extremely tedious while more modern extrusion process would not possible without precision machining?

            • Pika@rekabu.ru
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              4 天前

              True

              But no one said it would be easy. We have all this machinery refined over the centuries for a reason, but doing rough models first would help jumpstart entire industries that would help recreate the rest much faster and without jumping through the hoops.

              • Axolotl_cpp@feddit.it
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                4 天前

                Yeahz maybe you can show to some rich dude this new tech or something? Maybe if you are able to recreate a steam engine too you can promise to cut down labor or something

  • General_Effort@lemmy.world
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    5 天前

    Huh. At first, I thought that was about rubbing the kitty with some amber.

    “Thales of Miletus, writing at around 600 BC, noted that rubbing fur on various substances such as amber would cause them to attract specks of dust and other light objects.” (Yes, that Thales.) It is still, or again, a popular demonstration, though we use plastic instead of amber. Amber in Ancient Greek is “elektron”.

  • gnu@lemmy.zip
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    5 天前

    Electricity is a hard ask to even attempt to do in ancient times. Luckily there’s a variety of other simpler things to establish yourself as a genius inventor - strirrups, wheelbarrows, magnetic compasses, the idea of a crank handle, and how to use triangular bracing to make a strong truss would be good options.

    • Jankatarch@lemmy.world
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      4 天前

      Washing hands before performing another surgery when you just finished patching some soldier’s infectious wounds.

      • gnu@lemmy.zip
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        4 天前

        That’s one with big potential but not one to lead off with, best to wait until you’ve ‘invented’ a few obvious game changers and established your philosophic credentials before attempting to introduce basic medical hygiene…

    • general_kitten@sopuli.xyz
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      5 天前

      i would say metallurgy was advanced enough for some very simple generators using a lodestone and copper wire, that could then at least used as a heater or establish electrolysis to advance chemistry quite a bit, but applications would likely stay niche or just a curiosity, carbon arc lamps would maybe be possible but hard.

  • Captain Aggravated@sh.itjust.works
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    5 天前

    I actually read A Connecticut Yankee in King Arthur’s Court recently. It’s one of those things where I knew the whole story going in because pop culture had remade it several times for both children and adults. I got Star Wars the exact same way. But I recently listened through the original on LibreVox.

    Twain apparently wrote it to poke fun at a friend of his who wrote stories about noble knights errant, which is why he creates an ancient people who are perfectly ignorant and perfectly gullible, that stories of “rescuing maidens from a giant” were extremely embellished stories of buying pigs back.

    Then there’s the entire aspect of a modern engineer teaching a historical people new technology. Twain makes a BIG deal of “Arkansas journalism” and convincing knights to carry advertising billboards with them which would have been very modern and American to a 19th century man. But also he manages to set up a printing press in a land that doesn’t understand pulp paper, a telephone network in a land that doesn’t understand electricity…in apparently a couple years?

    Me? I think I’m an above average candidate for this scenario, I’d die in a boiler explosion attempting to build a steam engine.

  • QuinnyCoded@sh.itjust.works
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    5 天前

    imagine showing them the quadratic equation and they’re just like “why does this matter” and just being like “idk I barely passed”

  • rmuk@feddit.uk
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    5 天前

    That’s a joke-turned-plot element from one of the Hitchhiker’s Guide books. The protagonist, a human everyman stranded with a primitive culture on a distant world realises he has no idea how electricity, steam engines, medicine, etc works but he becomes a respected member of their community by making sandwiches.

    • General_Effort@lemmy.world
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      5 天前

      Mostly Harmless. I didn’t like that one. It was somehow bleak and left me worrying that DNA was in a bad place when he wrote it. I’m going to be a heretic and say that I did like how Colfer continued the series.

      In a Discworld novel, an off-hand remark mentions Ponder Stibbons wanting to build a Van-De-Graff-generator by tying cats to a wheel. I wish I could remember which book it was.

      • agamemnonymous@sh.itjust.works
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        4 天前

        I kinda liked the bleak. It felt like an ending. Drove home a fairly central theme

        Never read Colfer’s continuation, I read some of the Artemis Fowl books when I was younger and I didn’t really expect him to match Adams’ particular style.

        I did listen to the radio adaptation though, and if it’s true to the source then it was… okay? I’m not sure it added much.