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[–] 255 points 2 years ago (8 children)
  • [–] 230 points 2 years ago (4 children)
  • [–] 32 points 2 years ago (3 children)
  • [–] 30 points 2 years ago (4 children)
  • [–] 20 points 2 years ago

    In condensed matter physics, a time crystal is a quantum system of particles whose lowest-energy state is one in which the particles are in repetitive motion. The system cannot lose energy to the environment and come to rest because it is already in its quantum ground state. Because of this, the motion of the particles does not really represent kinetic energy like other motion; it has "motion without energy".

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  • [+] -14 points 2 years ago* (last edited 2 years ago) (2 children)
  • [–] 38 points 2 years ago* (1 child)

    Honestly fine with it as long as any profits aren’t privatized.

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  • [–] 10 points 2 years ago (1 child)
  • [–] 8 points 2 years ago (1 child)

    And I’ve got good news for you. You can just email the researcher to get a free copy. Because they don’t get any of the profits from scientific journals, so they have no incentive to hoard their own research. Or hell, there’s always Anna’s Archive.

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  • [–] 25 points 2 years ago

    Theorized form of matter that could exist in the cores of neutron stars.

    Essentially matter compressed beyond a critical point where protons and neutrons break down and dissociate into quarks.

    If this quark matter contains strange quarks, then it is called strange matter.

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  • [–] 51 points 2 years ago (4 children)

    I wouldn't even try to defend OP, but I once heard someone say that if you have more than four apples, then it is also definitely true that you have four apples.

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  • [–] 18 points 2 years ago

    That's true in a very literal sense, but there's a whole branch of linguistics called pragmatics that's concerned with things like why it's usually safe to conclude that when someone says they have four apples, they mean that have only four apples. When there's any ambiguity I talk like a mathematician and use phrases like "at least four apples" or "exactly four apples".

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  • [–] 13 points 2 years ago (1 child)

    It's technically correct, like saying at least 4 people died from covid.

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  • [–] 1 point 2 years ago

    What if there's a worm in one of them?

    Like, you think you habe more than four apples.

    Then you find out that most of them have worms.

    In the end, you are left with two apples.

    So now, it is not true that you have four apples.

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  • [+] 19 points 2 years ago* (last edited 1 year ago) (1 child)
  • [–] 11 points 2 years ago* (last edited 2 years ago) (1 child)

    If you can actually have a reasoned discussion about it, instead of simply getting angry at being questioned, then you are better than 90% of teachers.

    In my experience most teachers don't like being questioned, which of course is directly antithetical to their supposed vocation.

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  • [+] 1 point 2 years ago* (last edited 1 year ago) (2 children)
  • [–] 3 points 2 years ago* (1 child)

    Sounds like you just don't want your authority to be challenged.

    If you're wrong and a student points that out, own it. Instead you expect them to question their own knowledge while submitting to your authority for confirmation or denial. But if the student already knows, they don't need your confirmation. They need you to admit that you were incorrect, and move forward with the correct information. Otherwise you're just demonstrating that you're an authority that cannot be trusted to be fair.

    Authority that cannot be challenged is authority that cannot be respected. Authority must continually earn the respect of its constituents, or it will lose its power over them.

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  • [+] 2 points 2 years ago* (last edited 1 year ago) (1 child)
  • [–] 3 points 2 years ago* (last edited 2 years ago) (2 children)

    I identify as degenerate matter

    Edit: Whoops, someone already commented that elsewhere in the thread. Oh well.

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