Bullets are made of lead
for the military: not anymore. lead for bullets is only used for hunting nowadays and even there it is banned in many countries (being replaced by copper or zinc instead). the core of military small arms projectiles is usually steel or a special penetrator (i.e. tungsten)
hi from the internet!
Tatsächlich ist das vermutlich das geringste der Probleme. e-Fuels werden mit 99%er Sicherheit durch Fischer-Tropsch-Synthese (FT-Synthese) aus Synthesegas hergestellt werden und deren Produkte haben eine deutlich andere Zusammensetzung als erdölbasierte Raffinate. Ein Marker den man relativ leicht messen könnte wären vermutlich die zyklischen Kohlenwasserstoffe und speziell Stoffe wie Toluen; diese kommen in Benzin natürlich vor aber bei der FT-Synthese werden sie kaum anfallen (unter Nachweisgrenze). Sensoren für beispielsweise Toluen gibt es bereits.
Das Hauptproblem ist das der Preis selbst im optimistischsten Scenario unter Ausnutzung wirklich aller verfügbarer Synthesegasquellen (Biomasse, erneuerbare Energien, Industrieabfälle…) sich derart gestalten wird das keiner damit seinen PKW betanken wird außer vll. Millionäre.
Looking at the price per kWh for commercial batteries tells me that we are seeing the battery revolution right now.
Graphene is already commercially used in some applications:
There are already very effective cures for some types of cancer (note that the differences between the many types of cancer can be huge and so the effort and time needed to create cures will also be very different. some treatments also are effective but not completely understood yet, like for bladder cancer)
Nuclear fusion devices are commercially used in material analysis (mostly in the semiconductor industry and in ore processing). There are different types in use – some even use thermonuclear fusion on a small scale.
It all seems like super crazy superconductor level tech until it becomes mundane and part of peoples lives ... then we stop noticing how amazing it really is.
JXL rocks! Its so sad that some browser vendors are seemingly trying to kill it. It has basically all the features you could want for a JPG replacement and also has a reference implementation that implemented all that stuff as free software and with good documentation without any patent bullshit attached.
woah this is awesome!
maglevs need classical wheel systems anyway because there might be a power outage, so simply having wheels that are compatible with the local rail system is a brilliant idea.
add in a tiny propulsion system so they can use the normal tracks at low speed without the help of the maglev tracks and you can sort of blend the two systems together in critical locations like switches and train stations.
Unauthorized ~~bread~~ cheese
weiß nicht ob das hier auch so ist aber beispielsweise in deutschland gibt es vom umweltbundesamt einen leitfaden für diese frage.
für die spezialwerkzeuge wurde ein eigenes klassensystem geschaffen 0 (Seite 157 speziell auch seite 160). Ist im prinzip ein punktesystem das bestimmten kriterien folgt. ein paar beispiele:
also um deine frage zu beantworten: ein torxschraubendreher ist ein "bisschen" spezial aber alleine vermutlich noch kein grund dafür ein gerät als schwer reparierbar nach der entsprechenden norm einzuordnen. abhängig davon welche kriterien erfüllt oder nicht erfüllt wurden kriegt das gerät eine entsprechende reparierbarkeitsklasse.
uhh klingt nach einem sehr tollen spielzeug. und scheint auch gar nicht so teuer zu sein wie ich erwartet hätte… danke für die idee
noch eine idee: inverter mit NF-Eingang zur Leistungsregelung nachrüsten und Zweitverwendung als Plasmalautsprecher freischalten :D
extending a bit on @mustbe3to20signs' answer:
here is a nice article about the total number of individual T Rexes that ever lived: https://www.nytimes.com/2021/04/15/science/tyrannosaurus-rex-population.html
This is for a single species of dinosaur (T. Rex)!
Next comes the question of how likely it is that a dead T. Rex leaves a skeleton that will be preserved up until our time. Fossilization requires special conditions to be present for many years following the death of the animal, otherwise the skeleton will not be recognizable anymore, after just a relatively short time (as is the case with skeletons in cemeteries for instance where you would expect decomposition to soil within a couple hundred years). Here the article has another huge number:
Those odds lie somewhere between the chance of a human being bitten by a snake and then dying from it and the chance of winning the lottery. So kind of low, but given the number of T. Rexes that lived it's still a respectable chance.
But what about other large dinosaurs? (ignoring all species that are still around like birds and crocodiles here). If you extrapolate a little bit for the total number of dinosaur species you will soon notice that the likely number of dinosaurs that walked the earth is just so huge it boggles the mind.
from Wikipedia:
Lets round that to a nice 2000 species and assume all of those had at least as many individuals as the apex predator T. Rex (most species actually weren't predators so their numbers would have been larger). So we get a number of 5 trillion adult dinosaurs ever. Multiply with the chance of fossilization (simplifying here by assuming the chance is the same for all species which is probably far off but hopefully we are still in the right order of magnitude).: 62500 adult fossilized individuals among all dinosaurs that lived in the Mesozoic assuming they had all very small population numbers, like the T. Rex. If you assume larger populations, like would be expected for herbivores, you could easily get numbers that are 1000 times higher, but the uncertainty is pretty high anyway.