Wow TIL, the ancient Egyptians knew how to harness hydrogen gas! /s
this post was submitted on 16 Aug 2024
243 points (99.6% liked)
InsanePeopleFacebook
2486 readers
533 users here now
Screenshots of people being insane on Facebook. Please censor names/pics of end users in screenshots. Please follow the rules of lemmy.world
founded 1 year ago
MODERATORS
Haha, you rube. They used helium.
Supposedly the Egyptians did know how to make a simple battery. Mythbusters reproduced the battery and it produced around 4 volts. It only takes 1.5 volts to produce hydrogen gas from water via electrolysis. It's technically within the scientific capability of the Egyptians to do this, although I don't think it likely.
The "Baghdad Battery" is still so far fetched. There is also the huge issue of trapping that much hydrogen, since the atoms are so small.
It was not Egyptian and almost certainly not a battery.
Milo Rossi has covered this in detail in a very good video.
https://www.youtube.com/watch?v=cRZR_TeVi5Y
He also has a follow-up to that video with an expert on the subject, an actual archaeologist who has studied the so-called battery.
It's capable of being used as a battery. Doesn't mean it was.
load more comments
(1 replies)
Sounds Like a bunch of hot air to me...
Ha! You've been bamboozle!
Ooooh, i love this idiot! It overlaps my historical leather working hobby with my hatred of pseudohistorical bullshit.
So, a 30m diameter sphere contains 14.000m3 of gas. Every liter of hydrogen lifts 1.14 grams, and for helium it's 1.05 grams. So 14.000m3 = 14 million liters, or about 14 million grams, which is 14 tons. Sounds pretty decent until you realize that animal hide isn't exactly weightless.
A tanned cowhide, before it's split, is over 4cm thick. Vegetable tanned cattlehide weighs something like 40 kg for a 5m2. But lets see how thick out balloon is. If it can lift 6 tons, it can only weigh some 8000kg itself. Our 30m sphere has a surface area of some 2800m2, so that means our animal hides can weigh, at most, 8000/2800=2.8kg per square meter. Those at home have probably noticed that 2.8 is a bit less than the 8kg you need to use cowhide.
So, what kind of leather or hide were those balloons then? Well leather is usually sold in "ounces per square foot" (even in Europe), so we can just look it up. 2.8kg per square meter is about 9.2 ounce per square foot (says wolfram alpha), and a handy table I have printed says that's around 3.6mm thick.
So, we are too believe that the Egyptians made a 30m balloon, out of what is basically cheap-belt and saddlebag leather, somehow got that not just air-tight, while being ridiculously thin, and then used it to build massive structures.
I will note there is historic precedent for using gut, not hide, for lifting gas envelopes. Airship R101 had gut gas bags.
Do they need to do that before, or after they learn how to harness a tremendous amount of hydrogen? Which they conveniently forgot to mention anywhere.
You also think that they would have made a few pictures of that happening, instead of the pictures they did make, which clearly show manual slave labor building the pyramids.
Not just air-tight, lighter-than-air-tight. I'm not sure if it's true for the whole set of lighter-than-air gasses, but helium is infamously difficult to keep from leaking, even with modern technology.
Good at making gasses behave is a weird choice for ancient technologies we lost.
Hydrogen is even worse. It basically moves through solid steel cylinders.
Hah gain even more lifting power and also sidestep the whole need of creating helium by filling it with vacuum!
\s if needed 🤷🏻♀️
load more comments
(1 replies)
I gotta be honest, this is the first conspiracy aliens nutjob theory that I could actually expect to see on myth busters. Not with different glasses, but at least with hot air balloons. Granted, those didn't exist for centuries still, but at least this sounds remotely possible
Such experiments have been done before. Not in Egypt, as far as I know, but it was shown through demonstration that the Nazcans, who drew the famous shapes in the Peruvian desert you can only see clearly from above, had all of the materials to build a functional hot air balloon.
The problem is that there's absolutely no evidence they ever did such a thing.
https://www.hallofmaat.com/americas/grounding-the-nasca-balloon/
Also, if you're making a picture for a god, it doesn't really matter if you can't see it.
Gotta love how some people alive today cannot comprehend the fact humans have been able to build large structures long before we had things like crains and electricity.
I imagine they are the same people who look at something like a castle in the UK built in the 12th century or the great wall of China and assume that it was impossible for humans to have built them because they believe humans were too dumb (ironically) to have figured out how to lift rocks using any other method than crains.
In case this is of interest to you, since 1997, a group of archaeologists and experts have been building a castle in France as accurately as they can in the way it was done in the 13th century. Apart from adding certain things for safety reasons, they try to be as authentic as possible. Of course, it's taken decades and it's still not done... but that's because it's a freakin' castle. (Also, they don't have a huge workforce, but that's something else.)
It's even had a practical use. They were able to apply what they learned when reconstructing Notre Dame after the fire.
https://en.wikipedia.org/wiki/Gu%C3%A9delon_Castle
There was also a British documentary series about it with three archaeologists from Britain who go to contribute to the project and live in a Medieval style- https://www.youtube.com/watch?v=ydoRAbpWfCU&list=PL72jhKwankOiwI5zt6lC3eQtsQDxOaN_g
There are several recreations of old Age of Sail ships, made historically accurate via historical methods, and its been incredibly educational for historians worldwide.
Reenactment like this is extremely useful in recreating information that was either a professional secret, or considered so blatantly obvious nobody ever had to write it down.
I tend to think the difference is that the people building it today don't need to build it, along with the lack of a work force. Necessity is a great motivator.
I also doubt they had hundreds and hundreds of workers doing manual labor as part of their taxes. And modern people had slightly different ideas of what acceptable labor is.
'Work force' doesn't automatically mean multiple hundreds of people.
I find that the general trend is that if they were white, people say "wow, people can do amazing things!" like with Stone Henge, but when they weren't white, it would have been impossible and there is some missing fact like aliens or whatever.
What's amazing to me is that ancient people looked at what they were being asked to build, and the tools they were expected to build it wiht, and didn't just say "No, go fuck your hat."
Gotta love how some people alive today cannot comprehend the fact humans have been able to build large structures long before we had things like crains and electricity.
Yeah? You say that but like, uh... where's your proof, man?
Because they definitely had a good supply of helium and/or hydrogen laying around to fill these balloons with, when levers and wheels were too advanced.
Right.
Clearly they used methane.
Crowds of farm labourers during flood season, all lined up just waiting for their turn to fart into the balloon.
It would be another age before they realized they could fill the balloons twice as fast using camel farts.
You know you can make hydrogen out of water right? You just need high voltage electricity.
Which the ancient Egyptians clearly had
Likewise, why would they bother with balloons, at all? We know they were highly advanced, it seems more likely they'd just skip to planes?
load more comments
(3 replies)
Nope, found my line. This is too absurd and well typed for me to believe this one isn't just taking the piss.
You must not be familiar with Graham Hancock. That's kind of his whole schtick- sounding like he knows what he's talking about by sounding erudite but talking absolute garbage.
I've seen one that said they were built with sound
I mean they weren't on mute.
Actually that puts a funny idea in my head. Several pyramids away from Giza, the stepped pyramid, the bent pyramid and the ruined pyramid were all built by Sneferu, Khufu's father, and obviously only one or none of them could have been his tomb. What if he had some weird obsession that they had to be built in utter silence and gave up on one and made them start again if any of the men so much as grunted?
*Sneeze*
"AMUN DAMN IT, MERET! NOW WE HAVE TO BUILD ANOTHER ONE!"
taps head Guaranteed job security.
That's how the modern flat earth movement started.
Formula for surface area of a sphere: πD^2^
Surface area of 30m diameter balloon: 2827.43 m^2^
Average cow hide size: 4.6 m^2^ source
For one balloon, you'd need 614 cows (approx)
Most relevant
Lol!
And super dense ~~helium~~ hydrogen!
(The size of the Hindenburg isn't relative to how much it could lift it was relative to the amount of ~~helium~~ hydrogen gas required to lift things.)
*Hydrogen
You are correct sir.
Can't tell if the parenthetical is sarcasm or just genuinely wrong.
You need a certain amount of hydrogen to create lift.
The size of the Hindenburg would be relative to the amount of hydrogen needed to create such a lift.
Therefore, the size of the Hindenburg isn't relative to how much it can lift. The amount of hydrogen is the only thing that is relative.
If you wanted to gain the same amount of lifting power in a smaller package, you would have to make the hydrogen denser which would turn it into a completely different element in and of itself which is why the statement in the post is funny and mine numbingly stupid.
I still can't tell if you're being intentionally sarcastic or if you genuinely don't know how aerostatics work.
load more comments
(1 replies)
If only. It's funny to think, but hot air balloons could have been bronze age tech ( they almost certainly never were). All they would need is a giant sack made from fine thread, a source of heat, fuel, ballast, ropes, and a basket. Totally doable, but it's another one of those things nobody thought of until very late.
This is why you need to completely cut off your internet before you take a hit of that good shit
view more: next ›