• MarmaladeMermaid@lemm.ee
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    2 years ago

    Is this a picture taken off a tv screen?

    ETA: I’m not complaining, this place needs as much T’pol as it can get and this is a lovely template.

    • Natanael@slrpnk.net
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      2 years ago

      Actually actually Temperature is expressed as the inverse of the rate of change of entropy with internal energy, which in normal materia in normal states translate to average particles speed, but in extreme cases entropy can start to decrease with increasing energy and vice versa

      • MrPoopyButthole@lemmy.world
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        2 years ago

        Yep, entropy is the key word here. Amount of different possible states -> “random” vectors of inertia + particles speed -> higher temperature. If all the particles were going in the same direction -> lack of different states -> low entropy (which can still be high energy, but measured as low temp). AKA what laser cooling does.

  • xkforce@lemmy.world
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    2 years ago

    The more precisely momentum is known, the less precisely is its position known and vice versa. As for how temperature affects these measurements, the velocity of atoms and molecules isnt a sharp peak but a probability distribution whose maximum shifts toward higher velocities as the average temperature increases.

    • tias@discuss.tchncs.de
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      2 years ago

      IIUC extremely cold substances turn into so-called Bose-Einstein condensates because their temperature (hence speed) is so tightly controlled that their location becomes more “spread out” in terms of probability. And you can’t fix its location without raising the temperature.

      • xkforce@lemmy.world
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        2 years ago

        Sort of. It has to do with certain matter (they have to be neutral bosons i.e particles with integer spin and no overall charge) being so cold that there arent really any higher energy quantum states for things to be in. So everything is essentially in the same state and functionally indistinguishable. Which is why not everything can form a bose einstein condesate.

        • Natanael@slrpnk.net
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          2 years ago

          It is a combination, if the particles’ positions don’t overlap then you don’t have a condensate, but at low enough energy and close proximity these particles will overlap