exchemist

But how do they do the window and door openings? And what about the foundations? I assume the 140hr figure relates just to erecting the walls, i.e. the bit done by the 3D printer. So that would be 6 days, if done on 24hr operation, or 18 days if done on single day shift basis for daytime human supervision. I'd like to know how long it takes to build brick walls for a similar house. Also, concrete is about the worst imaginable construction material from a CO2 emission point of view. I presume any substitute would have to be a pourable substance with similar consistency and setting time.

Lulu.

It's chiefly "slips, trips and falls", apparently. My wife and I did do a sort of informal safety audit of the house (we all took it in turns to do these at the company, as a matter of safety policy) and the fire blanket and extinguisher were a couple of things that came out of that. I also got her to get rid of a lethal pair of wide-bottomed trousers she had, with turn-ups that could catch her high heels as she was coming down stairs. Falling down stairs is a classic: humdrum and absurd, but true. Ladders are another one. But yeah, with these Li-ion batteries, though the chance of fire is very low, if it does happen it's pretty serious and potentially could lose you your house if you have big ones indoors! Another interesting finding from the company stats was that in spite of all the huge quantities of dangerous hydrocarbons and chemicals Shell handled on a daily basis, by far the commonest cause of lost time injuries on the company's time was.....road accidents. It was the sales guys who were most at risk, not refinery or oil rig operatives, as you might think. Hence the "engine on: mobile phone off" rule for driving. You would be automatically sacked for breaking that rule. Something of a culture shock in some countries, but that was partly the idea.

Yes, I sympathise. I hope that in a similar situation, having now explored the issues, I might have sufficient presence of mind to react with some of these factors in mind. I did get hands-on training in how to, and how not to, put out oil fires, when I worked on the refinery at Shell. My late wife and I both worked for the company and at one stage they had a big push on domestic safety, as the home is where most accidents occur. As a result, I keep a fire blanket in my kitchen and have a water mist type extinguisher (which can be used on electrical fires) just outside my kitchen door. But I have never yet had to use them in anger. I’m sure a lot of how one reacts is to do with the shock of the unexpected and whether one has some idea of what to do. At least now, thanks to @StringJunky ’s anecdote, we know the kind of effect that can be produced, so maybe we might stay a bit calmer if it happened to us!

I’d think that reasonable so long as you did not throw or drop the thing suddenly. It seems to me one has to think in terms of something like a chip pan fire.

I've read through it and I repeat there is no thought experiment anywhere in it. It's a rambling muddle of sciency words, thrown together at random, for instance: - "The natural tendency for a hydrogen C-atom is to make a perfect sphere. As a single cavitation (C) on a single singularity its inherent tendencies to make it's photon and corresponding electron-shell at the different times of the bounding wave are very simple." Or "If that wasn't hard enough to waddle through.. lets call the hydrogen C-atom's want of a perfect sphere it's 'true' shape and the effect the affect of the warpage has on it as it's 'apparent' shape. Why? Because there is a difference when it comes to buoyancy only existing in gravity. Harmonic bonds that perpetually reshape the energy forms bonded between local elements and molecules, aka anti-gravity in a solid aether." WTF? I'm sorry but this is a waste of everyone's time.

I'd have thought anything that breaches containment of the electrolyte might well cause a very rapid flare-up, even if not technically an explosion.

My limited understanding is that at high temperatures some of the components actually evolve oxygen, so the thing cannot be smothered. The only way to stop it seems to be either to let it burn out somewhere where it can't damage anything else, or to use copious amounts of water, sufficient to cool it enough to stop the further evolution of oxygen. At least, that is what I have read somewhere the fire brigade tries to do.

No it is not a thought experiment. A thought experiment lays out a particular physical scenario in detail, to illustrate how a hypothesis or theory can be applied to a real situation, or else to derive a hypothesis from it. There is nothing remotely resembling that in what you have posted.

What thought experiment?

Is this the entire structure made on-site, or sections made in a factory that are them moved to the site for assembly? If the latter, the structure required to enable the pouring of concrete to the 3D printer pattern must be humungous. I would expect it to be very costly and time-consuming to erect for each house. I presume this technique can't be used for reinforced concrete. I wonder what they do to achieve an aesthetically acceptable surface finish. I don't imagine the ribbed surface will be very attractive. Though I suppose the grooves will retain moisture and may promote growth of moss and so on. So may they look quite green and "eco" after 10 years or so.

I can't visualise that. Is there a link or a picture? Must admit I've never understood 3D printing.

Quite so.

You didn't write that. The style - and the obsequious opening - are quite at odds with your own. You are quoting some other source, without attribution. You have done this before, introducing egregious errors in the process.

This is a nice example of why you pick up downvotes.

A more self-aware person might be asking themselves why. But then, a more self-aware, or more socially adroit, person would probably not have accumulated so many downvotes so rapidly.

I’m afraid this is word salad: https://en.wikipedia.org/wiki/Word_salad

My last visit to McDs would have been in 1999-2000, when I was working in Houston TX and on a road trip with colleagues. I married a French woman, you see. 😄 Regarding the story about the original Mr. MacDonald, I’m not surprised. Plenty of people don’t have the energy, or the drive, or the greed, and don’t want the aggro. We should value such people more, I feel. They have something valuable to teach us.

Accusing people who don't express interest of being "afraid" is classic crank boilerplate. So 20 crank points for that. Also I note the riot of fonts and colours, again characteristic of cranks. So 10 more crank points for that. 😁 You never responded to my post in 2021, asking whether all you had done was insert the f-block in between the s and d, which every chemist knows is where it fits. It looks as if, at that time, that indeed was all you had done. Hence nobody thought this was a great revelation or worthy of comment. Now, 3 years later, it seems you have added this little vertical displacement to indicate net unpaired electron spin and talk about Hund's Rules. I don't really see the value in this. It seems to add complexity to no particular purpose. Most chemists are not that much concerned with ground state atomic term symbols, but with how elements react chemically. The unpaired spin in the atomic ground state does not seem to me to yield much insight into the chemical compounds formed by the elements. Or do you think it does?

Yeah but none of those is actually tea. They are infusions that are called “tea” colloquially and for marketing purposes but they are not real tea. The French call them tisanes, but in English we don’t seem to have a name that does them justice.

You've already done this, several times, over the last few years, haven't you? Why do you think we are going to be any more interested this time round?

Yes, it takes longer than a teabag to brew, as the leaves are whole or in big pieces rather than "dust". But then tea is meant to be something relaxing, that you stop what you are doing to enjoy, so a few minutes to get it right should not be an issue. Same general idea as pouring Irish stout, I suppose.

Oh Christ [rhetorical]🙄 I stopped visiting that site because of its toleration of trolling, bad faith argument - and all the monomaniac nutters. This is a haven of rationality by comparison. You may need to up your game here.

Do I know you? I generally avoid having friends who are barking mad🤪😁

There are estimated to be over 2 billions Christians around the world. Are you seriously expecting us to believe that they have been able to hide a “covert” belief like this from themselves and everyone else for 2000 years?