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Cake day: June 24th, 2024

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  • nope, the full relativistic energy relation is:

    E2 = m2 c4 + p2 c2

    p is the momentum and for a (massive) particle at rest the momentum p=0, taking the square root if both sides you get the more familiar:

    E = m c2

    Now a photon (and any other massless particle) can’t be at rest, it is forced to always travel at the speed of light and since it is massless m=0 and the energy becomes (again taking the square root):

    E = p c

    When a particle has both mass and isn’t at rest (but not traveling anywhere close to the speed of light) the E = m c2 is much, much larger than the E = p c part (ignoring that a square root isn’t linear {Hello Dirac}). Because the speed of light c is such a a huge number that squaring it makes it even bigger. It is usually fair to say that mass is ‘equivalent’ to energy, but it isn’t strictly true and actually false for massless particles (or particles traveling close to the speed of light [velocity v~c] -> p=m v~m c -> E = pc ~ m c2 , which has close to c2 in it).

    So photons have energy, not because they have mass (where massive particles have most of their energy), but because they have momentum (p).

    You bring up the theoretical black hole from photons, which are called ‘Kugelblitz’ black holes, iirc. They (theoretically could) exist, not because photons have some sort if mass, but because spacetime curves because of the energy content, not mass. Again, for most regular objects, the vast majority of its energy comes from its mass and the momentum doesn’t play a huge role. But for photons all their energy comes from their momentum, since they don’t have any mass.

    Source: my bachelors degree in physics, I suppose.


  • But were they selling Steam Keys? Sounds to me like Ubisoft was selling a UPlay version of the game for cheaper than the Steam version, which probably didn’t include a Steam Key.

    If the UPlay version also included a Steam Key, then yes, Ubisoft would have broken the terms of contract, but that seems unlikely to me.

    I think its fair enough for Valve to require that Steam Keys, which use Steam infrastucture, are not sold for less than Steam sells them for, since Valve wouldn’t be making any money on them, but would still have some of the costs associated with delivering the product (and depending on how much Steam infrastructure they use, matchmaking, anti-cheat and other things).

    But requiring that keys for other Stores, with their own infrastructure, are never cheaper that Steam is definitely monopolistic, shitty and probably illegal.

    Its weird to me that all articles I have found about this issue don’t actually mention this crucial detail.




  • I think they should’ve called it Electron, since a Proton is a specific particle (or more accurately specific combination of 3 Quarks = Baryon) while Leptons are a whole class of particles (electron, myon, tauon, Neutrinos).

    I know Electron is already taken by the JavaScript Software Framework Tool, but still.

    Gluon would be a great name to combine all these different tools with each other, where the correct Proton/Lepton/FEX or other (future) translation layers are used automatically, so the user doesn’t need to know that there a different technologies under the hood depending on what your trying to run


  • Waydroid is a container (like docker), not an emulator. So waydroid on its own on a regular x86 Computer will Run only x86 Android Apps, but if it were installed on an ARM machine (like one if the Snapdragon Laptops) it would run normal (ARM) Android Apps (and no x86).

    To run any android app on x86 you need to emulate ARM, which waydroid doesn’t do on its own, but scripts exist to add it to waydroid; https://github.com/casualsnek/waydroid_script

    I’m assuming Valves Lepton does all if the for you, as well as using some optimized settings for some of the most popular Apps.

    When I last used Waydroid (also about a year ago) I had problems with GPU Acceleration not working. All I wanted was SmartTube on my HTPC, but all videos were insanely choppy and laggy, so I hope they focus on that a lo. (if anyone knows a way to get ad-free YouTube with a TV like interface for free on linux, please let me know :) (I’ve also tried Kodi with a YouTube Plug-In and while it worked, the interface was pretty ass, so I’m just using Firefox with UBlock and a Bluetooth Mouse+Keyboard, which works but it like to be able to control it using just a cheap USB remote that I have)