Sodis

@Sodis@feddit.de

• ⁨Comment⁩ on ⁨bro pls⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  There are multiple reasons for that. We don’t know the decay channels of already discovered particles precisely. So there might be very rare processes, that contribute to already known particles. It is all a statistical process. While you can give statements on a large number of events, it is nearly impossible to do it for one event. Most of the particles are very short-lived and won’t be visible themselves in a detector (especially neutral particles). Some will not interact with anything at all (neutrinos). Then your detectors are not 100% efficient, so you can’t detect all the energy, that was released in the interaction or the decay of a particle. The calorimeters, that are designed to completely stop any hadrons (particles consisting of quarks) have a layer of a very dense material, to force interactions, followed by a detector material. All the energy lost in the dense material is lost for the analysis. In the end you still know, how much energy was not detected, because you know the initial energy, but everything else gets calculated by models, that are based on known physics. A neutral weakly interacting particle would just be attributed as a neutrino.

• ⁨Comment⁩ on ⁨bro pls⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  These things are really special interest. They developed small scale particle detectors, that are nowadays used in medical physics for example (PET scanners and so on). Then their electronics need to be very insensitive to radiation damage, that is also important for everything space related. There is probably some R&D on superconducting magnets as well, that can be adapted to other purposes, but I am not too up to date in this field and I am not sure, if Cern is a major player there.

• ⁨Comment⁩ on ⁨bro pls⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  The thing is, that you can’t predict, what fundamental science will lead to. In the case of the LHC the tangible returns are technologies, that can be adapted to other fields, like detectors. There are enough other arguments, why a bigger accelerator is a bad idea, where you do not need to trash fundamental research as a whole.

• ⁨Comment⁩ on ⁨bro pls⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  Yeah, but you could also fund a lot of other research with this budget. The point is, physicists just don’t know, if there are more particles existing. There is no theoretical theory there predicting particles at a certain mass with certain decay channels. They won’t know what to look for. That’s actually already a problem for the LHC. They have this huge amount of data, but when you don’t know, what kind of exotic particles you are looking for and how they behave, you can’t post-process the data accordingly. They are hidden under a massive amounts of particles, that are known already.

• ⁨Comment⁩ on ⁨Heat pumps can't take the cold? Nordics debunk the myth⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  The whole discussion started for winter conditions. You can find the numbers in the other comment thread.

• ⁨Comment⁩ on ⁨Heat pumps can't take the cold? Nordics debunk the myth⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  1l/h as I noted further down. Still less range lost relative to the maximal range than in an EV.

• ⁨Comment⁩ on ⁨Heat pumps can't take the cold? Nordics debunk the myth⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  The answers to your question is already in my post and the 150 was obviously a typo, because the loss in range checks out. It should be 15. AC uses less because the temperature difference is less.

• ⁨Comment⁩ on ⁨Heat pumps can't take the cold? Nordics debunk the myth⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  From cooling the engine. When you are standing still and the engine is running it consumes about 1l/h. I just looked up some numbers for EVs: 100kWh battery, heating takes 1kW for every 10K temperature difference, so 3kWh in -10°C. Its higher if you use additional stuff like the heating for the seats. With 150kWh/100km consumption you lose 20km every hour you are in the heated car. I would say that’s a noticeable difference compared to no heating. I also checked how much an AC takes in summer and its about 1 to 2kW for 30°C.

• ⁨Comment⁩ on ⁨Heat pumps can't take the cold? Nordics debunk the myth⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  That’s why I said it depends on the type of the heat pump. Some can go really low, the cheaper ones not. At some point (the latest at -273.15C :D) they need to switch.

• ⁨Comment⁩ on ⁨Heat pumps can't take the cold? Nordics debunk the myth⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  I mean, it’s not about them not working, it’s the efficiency. Most models will switch to a normal electric heater, if they can’t extract anymore heat from the surroundings. At which temperature that happens, depends on your type of heat pump.

• ⁨Comment⁩ on ⁨Heat pumps can't take the cold? Nordics debunk the myth⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  If you are in a traffic jam, you lose range because of the heating. For gas cars, that doesn’t matter at all.

• ⁨Comment⁩ on ⁨Twitch has stories now, because all social media has to be the same⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  Yeah, but somehow they don’t like clips and it’s a pain to access them now, if the streamer has not highlighted any.

• ⁨Comment⁩ on ⁨Is lemmy.ml turn into authoritarian?⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  But they are taking away free speech!!! \s

• ⁨Comment⁩ on ⁨New UK ‘net zero’ minister linked to oil-funded think tank⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  It’s the whole western world. Wealthy people amassed too much power and now protect their wealth against the interest of the many.

• ⁨Comment⁩ on ⁨Germany looks at boosting the use of geothermal energy⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  Yes, however there is also a prototype being built to provide electricity.