• 1 Post
  • 1.24K Comments
Joined 1 year ago
Cake day: June 6th, 2024
  • WolfLink@sh.itjust.workstoScience Memes@mander.xyz•Feynman rulesEnglish
    2·
    1 day ago

    I think it’s more fundamental than that. He could talk about relativity and electrostatics and particle spin, but at some level the electromagnetic force is called a “fundamental force” because it’s one of the postulates we just kinda accept about the universe, and any explanation he could give would depend on that assumption.

  • WolfLink@sh.itjust.workstoScience Memes@mander.xyz•Feynman rulesEnglish
    11·
    1 day ago

    To be fair: "A magnet works because negatively charged electrons repel each other. "

    This is the Coloumbic (electrostatic) force, which is related to magnetism but this explanation would be insufficient to explain magnetism.

    “… Well … Ok, so hear me out. You’re going to need to understand quantum mechanics and then the fermion principal. Then you’ll know that the electrons aren’t allowed to occupy the same space, and the easiest way to avoid being in the same space is to not touch each other. The electrons know they aren’t allowed to touch because they’ve studied fermions.”

    This is the Pauli exclusion principle, which does act like a force, but is not the same as the electrostatic force or magnetism.

    Magnetism is moving electrons repel/attract/affect each other depending on the direction they are moving.

    The simplest explanation for that I know of is that force needs to exist alongside the electrostatic force for the motion of electrons to be consistent with relativistic time and space dilation effects.

    And no, that’s not a simple explanation, and it requires explaining relativity, and at the end of the day the best explanation we’ve got for the electrostatic force is more or less “electrons repel each other because they do”.

  • WolfLink@sh.itjust.worksto196@lemmy.blahaj.zone•RuleEnglish
    1·
    2 days ago

    The Bell Test rules out the possibility of a local hidden variable theory explaining quantum entanglement. That means the states of the two entangled particles are not simply unknown before measurement, they do not have independent states.

    This means either, when you measure one particle it “instantaneously” affects the other, which has weird implications for causality because which particle is measured “first” can depend on your reference frame.

    Or there is something statistical and truly random going on.

  • WolfLink@sh.itjust.workstoGaming@lemmy.world•Don't make me choose!English
    62·
    3 days ago

    SMB3 does not use its unique tools to build new kinds of puzzles or present alternate paths through a level they just make the challenges a little easier.

    This is extraordinarily wrong!

    There are secrets that you need specific power ups to get to.

    • Raccoon/Tanuki are used to fly to secret areas or break blocks with the tail
    • Fire is used to melt blocks in the ice world
    • Frog can swim against strong currents
    • If you start some levels with an invincible star from the map, it will cause some blocks to drop a star instead of a coin, letting you chain invincibility through the whole level
    • Tanuki and Hammer aren’t necessary for anything in the main game, but they are for some e-reader levels where they can break blocks that can’t be broken normally
  • WolfLink@sh.itjust.workstoGames@lemmy.world•What's a recent game you've tried playing that isn't worth the hype?English
    2·
    5 days ago

    Interesting. Optimizing the factory for your immediate current needs sounds very tedious, because those needs change all the time. I instead optimize for expandability and adaptability. The factory game genre isn’t for everyone, but if you are interested in some tips:

    My solution is usually something like:

    • really long line of basic resources (usually a belt of smelted copper and a belt of smelted iron, eventually adding more stuff and adding more belts of iron and copper as supplies are needed)
    • when I need thing 1, I make a little package that builds it, drawing resources from the line with splitters so the excess can continue down the line
    • thing 2 is an independent little package farther down the line
    • When it’s time for thing 3, I build copies of the packages for building thing 1 and thing 2 as necessary to feed the construction of thing 3, again as separate feeds splitting off the main resource line
    • when it’s time for thing 4, its again independent of the production of things 1-3, except they are splitting off the same main resource belt
    • If the resources on the main belt are insufficient to feed all of those machines, one of three things needs to happen: 1. Add more raw resource processing until your belt is full and backed up at the beginning 2. If that’s not enough, upgrade the belt 3. If you don’t have a belt upgrade available, build another main resource line and use splitters to rebalance it onto the main line

    This construction allows for easy expansion without having to destroy anything. I typically don’t disassemble anything unless it’s actually a problem for some reason or I need the space. This is especially important because you often need some basic components like the level 1 belts even into the late game.

    Also, once you unlock robots, you can literally copy-paste, just select an area to upgrade all belts/arms/etc. in, and a lot of other neat tricks that drastically speed things up.

    And one last peace of advice: Overproduce everything and let belts backing up balance out the resource distribution. Then if you discover that belts that previously were backed up are now sparse, figure out why and optimize it, usually by adding more production of whatever the missing resource is.

    Ultimately throughput is all that matters. Loss of throughput because you don’t need something isn’t wasteful. Loss of throughput because you aren’t producing enough of something is a problem to solve. Things that don’t affect throughput don’t matter and aren’t wasteful.