Sensei

In 2020 BTC was for $6k-$12k for ~ 10 months, and just started growing in November - December'20. 49% from $6k-$12k is $3k-$6k which is within my electricity cost bracket. This can be said about any miners. e.g. gold miners were using Mercury to extract precious metal (and still use in 3rd world countries) *) Devastation of environment by open pit mine is common practice.. *) search engine keywords "gold mercury amalgamation mining". https://en.m.wikipedia.org/wiki/Patio_process (for silver extraction)

Well said. It is the main problem of capitalism.. Please, please, stop using these made-up by you numbers.. f.e. costs of mining 1 BTC is $5000-$8500 (the other source says about average $4160/BTC) *) The more advanced technology they use for mining i.e. specialised mining devices like antminer, the lower cost. If they would also invest in private solar panels grid **) and/or wind turbines the issue of too much electricity usage would be non-existing.. *) Search engine keywords "BTC cost of mining". **) which is marginal in comparison with the price of antminer.. $250-300 per 1.4 m^2 solar panel vs $10k for antminer.. no-brainer..

@Duda Jarek Counter examples that it will stop automatically at 11 B: - Japan has a population density equivalent to 50 billion people in the world. They continued reproducing when national food production reached 100%. Now they import ~60% of all food from abroad. https://www.google.com/search?q=japan+food+shortages "Japan is the world's second biggest economy but it struggles to produce enough food. The government says only 39% of the food the Japanese need is grown in Japan. In contrast Britain produces 70% of the food its population needs and France more than 120%." " Japan’s food self-sufficiency ratio on calories basis was 79 per cent in 1960 and had declined continuously reaching 39 per cent in 2015.[6]"

@Duda Jarek I think you misinterpreted my previous statement. What I meant is "I would rather take the lesson from Calhoun's experiment..." + "...because it is the most plausible source of Fermi paradox, rather than your cryptocurrency mining"... Existence of cryptocurrency mining in such form as now, is only possible in societies where money (and gaining wealth) is the main motor of people's activity. In societies where people share everything for free, existence of cryptocurrency mining, fiduciary currency, banking systems, economical crisises, hungry and poorness etc. is not possible (has no sense). There is/was old crowd distributed computing project S.E.T.I. @ home https://en.m.wikipedia.org/wiki/Search_for_extraterrestrial_intelligence i.e. "give us your computer power for free when machine is idle, and we will use that power to search for extraterrestrial intelligence (or whatever else is needed in alternative projects)". And guess what? People were not that keen on it (at media publicity), as they are now on cryptocurrency mining... There was no immediate money reward for it (therefore people reluctance). Even if they participate in serious and/or useful scientific project offering what they can for goodness of the entire humankind. In the Calhoun's experiment mice had free and unlimited source of food, so they (without being aware of what they are doing) did nothing but have sex and children, several generations per season ("sky is the limit" as some says). Which caused quick overcrowding of the limited area where they were living. Higher level organisms living too closely are extremely stressed (increased amount of wrong/inappropriate hormones during pregnancy of mothers resulted in homosexuality of offspring etc.), agressive, misbehaving etc. Current world is extremely focused on survival! If 70% of US average citizens have less than $1000 savings, and ongoing bills to pay, over and over again, they are just two weeks of being unemployed to bankruptcy or other financial problems.. I imagine such modern people are much more extremely stressed by such ongoing life, than ancient/medieval peasant thousand year ago (which could be stressed by survival of cold winter and having to hunt at winter if had shortage of gathered food)..

I would rather take the lesson from Calhoun's experiment: https://en.m.wikipedia.org/wiki/Behavioral_sink

I don't think so cryptocurrency mining poses any serious risk for human existence. At the beginning of BTC mining was done entirely by CPU. To speed it up and earn more and faster, GFX card code was created. Later it was replaced/extended by specialized mining devices e.g. antminer (unit cost $10k-20k!). This shows progress, evolution, industrialization, professionalisation of miners with time and "depths" of their pockets. The higher bills for electricity cryptocurrency miners will have to pay, the more likely they will invest in their own private solar panels grids (or other low cost power plants) to reduce costs. *) Natural route of evolution of this technology would be creation of satellites which would be placed on orbit and get much more energy directly from the Sun. e.g. put programmable**) antminer (or equivalent) in SpaceX satellites and offer Internet for free to the all people. *) If I would be cryptocurrency miner, I would get cheap electricity at night when cost is the lowest or even negative price i.e. power plants pay to get their electricity at night. **) It could be used to any heavy computation not just cryptocurrency mining.

https://www.google.com/search?q=cotton+uv+protection https://en.m.wikipedia.org/wiki/Sun_protective_clothing

No. Tritium is not abundant. You have to make it. From e.g. Lithium. Irradiate it by free neutrons in nuclear plant to induce decay to Tritium and Helium. https://en.m.wikipedia.org/wiki/Tritium Tritium has short half-life (12.32y) disallowing it to store it in serious amounts in advance.

Unemployed and angry coal miners..

Plausible visions and thoughts. But there is one problem. At least for You. You would not exist in this parallel Universe, if I would restart from backup took before WW1, and prevent it etc.. You exist, and you are you, just because history of the Universe went specific path in the past. If there would be no WW1 and WW2 or WW3 or WW4 etc there would be different wars which would be called WW1 and WW2 or WW3 or WW4 etc...

If somebody would like to remove water from solution he/she can: - freeze it (ice forms on the top so you should remove it when it forms.. also solubility of salt depends on temperature therefore I told you to gather and learn properties of compounds that you have in solution and analysis of data), https://en.m.wikipedia.org/wiki/Fractional_freezing "Freeze distillation is a misnomer, because it is not distillation but rather a process of enriching a solution by partially freezing it and removing frozen material that is poorer in the dissolved material than is the liquid portion left behind." - vacuum distillation. https://en.m.wikipedia.org/wiki/Vacuum_distillation "Vacuum distillation is often used in large industrial plants as an efficient way to remove salt from ocean water, in order to produce fresh water. This is known as desalination." (you just have different salt than seasalt) Having vacuum pump in the home lab is essential thing (apart glassware and stirrer with temperature control). - evaporate excess of water. https://en.m.wikipedia.org/wiki/Evaporation You have to start listening and reading the all materials which are given to you.. If you would ask "how would you efficiently extract alkaline carbonates from solution?" people would give you their ideas. But you asked "how to filter alkaline carbonates from solution?" and upset because people answered "it won't work".. Ask the right questions in the first place..

OP should ask for methods of separation of chemical compounds. "filtering" is not surprising term for typical layman. https://en.m.wikipedia.org/wiki/Separation_process 1) read Wikipedia articles of compounds in solution. 2) write down their properties. 3) pick up the one which is the most suitable, utilitizing differences in properties.

I suggest you to download and install a 3D application e.g. Blender and creation of cosmic objects: Earth, Moon and Sun with exactly the same parameters as you can find in Wikipedia articles. Then start animation in 3D. You will be able to check whether these parameters are working correctly and give you well known results..

If distance between 3rd object and group of 1-2 objects is significant, you can calculate center-of-mass of group 1-2, then use it like it would be one object. If you would be also interested in direction: If object A is at p0, object B is at p1, direction vector is normalized vector of result of subtraction. Pseudo code: vector p0, p1; vector delta = p1 - p0; direction = normalize( delta ); normalize( vector ) is equal to: double length = length( vector ); normal.x = vector.x / length; normal.y = vector.y / length; normal.z = vector.z / length; (notice you can't divide by zero!) length( vector ) is equal to: double length = sqrt( x^2 + y^2 + z^2 ); Dot product of two normal vectors is cosine of angle between them so you can learn what is angle in radians/degrees using arc cosine. So, if you have object A at position p0, object B at position p1 and object C at position p2. And AB makes a group of two close objects, you can calculate: vector delta20 = p2-p0; vector delta21 = p2-p1; double cosine = dot( normalize(delta20), normalize(delta21)); The closer cosine variable is to 1.0 the smaller angle was between AC and BC (because arccos(1)=0) The sharper angle the longer distance.

Chemosynthesis doesn't require a light source such as the Sun. https://en.m.wikipedia.org/wiki/Chemosynthesis Photosynthesis is not the only way an autotrophic organism can obtain fuel and energy.

I have Win7 and also can't delete some files in temp directory. It is normal. Any application can create (and keep access lock to) temporary files by using GetTempPath()/GetTempFileName() functions: https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-gettemppatha https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-gettempfilenamea Reread what I wrote in the previous post and identify which processes opened these files. And kill these processes/services. If process/service is shutdown, it should release exclusive access lock to temporary file. The real problem would be if files would be really big. *) You can try: edit environment variables e.g. change TEMP and TMP from default value: %USERPROFILE%\AppData\Local\Temp to something else. e.g. change to Temp2. Then restart the computer. Then you should be able to delete old Temp folder with the all contents (because it is no longer used). New temporary files should appear in Temp2 folder instead. Then rename environment variables back to the original value, and restart the computer once again. *) They can be e.g. automatic updates downloaded from the Internet.

Production of a high quality pure product most often requires distillation and/or vacuum distillation to remove impurities.

If the experiment was performed in the Fermilab, I would expect results being published on the Fermilab website. https://en.m.wikipedia.org/wiki/Muon_g-2 The reference was given in the Wikipedia article: https://news.fnal.gov/2021/04/first-results-from-fermilabs-muon-g-2-experiment-strengthen-evidence-of-new-physics/

If file is at the moment opened by some application or operating system, it cannot be deleted. Files can be opened in read, write or read-write mode. Files can be opened in shared or exclusive mode. Exclusive mode means no other process can access (open) file. Process holds handle to the file. You can learn which file is accessed by which process using FileMon or SysInternals. https://docs.microsoft.com/en-us/sysinternals/ If DLL (dynamic-link library) is opened by LoadLibrary() function it can't be deleted, until the all processes call FreeLibrary() or shutdown. DLL doesn't have to have .dll extension.

The metal is usually a very good reflector (mirror)....

@Dem93 I would try to use distilled water instead of tap water, the next time you will be preparing and boiling saline solution in your stainless steel pan, to see if it makes any difference. Don't change anything in your procedure except replace tap water by distilled water. Water can be fluoridated and/or chlorinated in some countries: https://en.wikipedia.org/wiki/Water_fluoridation_by_country https://en.wikipedia.org/wiki/Water_chlorination additionally it may contain unexpected elements ("water hardness"), such as Ca2+, Mg2+ https://en.wikipedia.org/wiki/Hard_water Additionally, in some countries salt is iodized: https://en.wikipedia.org/wiki/Iodised_salt Sea salt contains much more elements than just NaCl: https://en.wikipedia.org/wiki/Sea_salt 15% are impurities.

To create plasma arc use Van de Graaff generator. This is from my own: Alternatively you can build Cockcroft Walton generator https://en.m.wikipedia.org/wiki/Cockcroft–Walton_generator

No. To create a current, a photon would have to be absorbed by an electron which then would be ejected from the medium's atoms and accelerated. The ejection of an electron from an atom in a medium requires the addition of energy. Such thing happens in e.g. photoelectric effect: https://en.wikipedia.org/wiki/Photoelectric_effect A photon passing though a transparent medium has to exit it from the opposite side (otherwise the medium is opaque). An opaque medium can: reflect photons, refract photons (in random directions) or absorb photons. (a transparent medium for photon with one energy/frequency/wavelength is often opaque for photon with different properties!) An alternative (and actually more common) thing that can happen after a photon is absorbed as it passes through a medium is heating it. Radiowave antennas are absorbing some photons, which accelerate some (a very few) electrons in the metal, in one direction, then in other direction (depending on photon properties). Therefore the antennas are connected to amplifiers https://en.wikipedia.org/wiki/Antenna_amplifier which detect these minor currents and amplify them.

I think you have no idea what you are talking about.. When photon, with the right properties, passes through transparent medium with appropriate properties and there is applied external magnetic field, photon's polarization is rotated. It is called Faraday rotation. https://en.m.wikipedia.org/wiki/Faraday_effect and device is called Faraday rotator. https://en.m.wikipedia.org/wiki/Faraday_rotator

The real world example of what OP said ("westernization of people"): How about ex-bedouins wearing cylinder hat, and Western country clothes: Westernization has good ("harmless") sides (like the above example) and dark sides. If you are unfamiliar with this term read Wikipedia article: https://en.m.wikipedia.org/wiki/Westernization