marble is less resistant to heat but might work if it’s not directly in contact with the ambers and a little away from the fire. Chemically it is CaCO3 and if you heat it enough it will start to decompose to CaO and CO2 and crumble. It is a similar process to what you would see in a cement kiln :); not exactly stable but also not dangerous if it happens outside.
do you want natural rock or is synthetic also ok? also do they need to be resistant to freezing water as well? its not clear if there will be any kind of roof above…
very conservative answer would be something like granite, diorite or similar dense rock.
if you have protection from water you can also use more porous rocks like sandstone.
[…] > 98 % […] C10-DDAC were removed following secondary treatment […]
https://www.sciencedirect.com/science/article/abs/pii/S0304389424025135 secondary treatment ist die biologische wasseraufbereitung.
joah ich würd sagen das ist noch einer der harmloseren stoffe die man in eine waschmaschine tun könnte.
hydrofluoric acid
Not sure if serious but just in case: why would there be any HF in a lithium ion battery?
Are the parts both made of PLA? Silicone caulking would be elastic and easy to break but it might also become unstuck on its own since the adhesion to plastics is not great.
Rubber cement would also work in principle but it might not be reversible at all and depending on the solvent and what plastics you used it might damage the plastic parts while the solvent is drying. Acetone can damage ABS plastics for instance.
Would a low-temp hot melt gun work? They can operate as low as 120°C which might be low enough to not destroy the plastic parts.
yeah, but thats not really saying that it isnt cruel.
So 3 years of malnutrition is not cruel?
the country was treated generously for fear of it going to the other side
In Germany the shortage of food was an acute problem. […] the average kilocalorie intake per day was estimated to be 1,080, […] millions of people are slowly starving.
Germany received many offers from Western European nations to trade food for desperately needed coal and steel. […]. Denmark offered 150 tons of lard a month; Turkey offered hazelnuts; Norway offered fish and fish oil; Sweden offered considerable amounts of fats. However, the Allies disallowed the Germans to trade.
So “generous” is a bit relative here. Germany was not subject to the most extreme plans for de-industrialisation, which some had planned. But at the same time there was definitely planned hardship, which had no reasonable explanation based on security.
i think for Ariane 6 the marginal cost of a launch is simply still too high to ever get to those numbers. Maybe Ariane 7 will be better in that regard, assuming they manage to make the boosters reusable.
Arme Menschen sind eher kriminell
https://strafrecht-online.org/documents/111390/_4_-_Kriminalisierung_der_Armen_J5lV5bU.pdf
leider eine oft von großen medien verbreitete Fehleinschätzung. Es gibt sicher Zusammenhänge zwischen Armut und Kriminalität aber diese sind eben nicht 1 zu 1 wie du es beschreibst. Es gibt ganz sicher einen kausalen Zusammenhang zwischen der Art der Kriminalität und der sozialen Schicht … zB wird ein Millionär statistisch betrachtet vermutlich weniger Raubüberfälle durchführen um seine Drogenabhängigkeit zu finanzieren als ein mittelloser Obdachloser, dafür aber vermutlich mehr Steuerhinterziehung.
maybe time for CV dazzle: https://arxiv.org/pdf/2412.13507
This is not foolproof (read the paper for details) but it can help to protect peoples identities if used correctly.
It makes a lot more sense once you consider where you are starting from: a rock hurtling around the sun at breakneck speed (29.8 km/s). You can not really bullseye something when you are going almost 30 km per second sideways to it.
Eutelsat
OneWeb is owned by Eutelsat and i think that is the one they refer to in the article. OneWeb satelites use 450 km - 1200 km orbits so 3 to 8 ms delay assuming the signal goes straight up and straight down again.
In general waste glass and metals can be recycled easily and effectively and in many cases it is energetically efficient to do so compared to making new glass or metals form natural resources. There are a couple of caveats to this though that might be important:
There is a lot of research into metal recycling going on right now though, so that might change soon. :) Just because the technology exists to recycle something does not mean that somebody is doing it unfortunately. Even if it is economical to recycle something – meaning the recycled material would cost less than the virgin material – it is still possible that it isnt done because the market is too niche. For instance borosilicate glass can be recycled and it would be very energy efficient to do so but the market would be too small for anybody to invest in it. I guess energy is still too cheap.
Plastic liners in general are not typically recycled, if there is no easy method to separate them from the base material. This applies to cans, paper cups, metal bottles, furniture and lots of other things. In most cases they still allow the base material to be recycled though. For instance in ferrous metal recycling (cans) the plastic liners might simple be burned away in the electric arc furnace.
those missiles are almost certainly intended for ground launch.
That is mostly because those numbers take the average occupancy level into account. Cars are rarely driven with a passenger in every available seat.
If you replace a short haul flight with a ride on a train you could easily cut carbon emissions by 75% Source
On the short term: maybe
On the long term: makes absolutely no difference. Some of the soot from those fires might actually settle in the soil and stay there for 100 - 1000 years, which is probably the least harmful way petro chems could be converted. The portion that would have been converted to plastics and rubber might be a grey zone, but not a large one, since a large portion of that is burned at the end of its useful life.
upvote for use of capital ß
* Mike Oldfield starts playing in the background *