• theneverfox
    link
    fedilink
    English
    arrow-up
    25
    arrow-down
    1
    ·
    4 months ago

    An explosion is pure entropy. It’s high energy releasing to a low energy state in an uncontrolled manner

    We climb down the energy slope very slowly to reverse entropy and create order

    The universe is like us - temporary order emerges as it slides towards entropy

    • yetAnotherUser@discuss.tchncs.de
      link
      fedilink
      English
      arrow-up
      3
      ·
      4 months ago

      But are we actually creating order? To maintain life’s order, we are creating much more disorder somewhere else.

      Life is but an entropy maximization machine.

      • vithigar@lemmy.ca
        link
        fedilink
        English
        arrow-up
        1
        ·
        4 months ago

        On the overall scale of the universe? No, not even remotely close. On the local scale of the Earth, generally yes.

        • yetAnotherUser@discuss.tchncs.de
          link
          fedilink
          English
          arrow-up
          1
          ·
          4 months ago

          Well, as much as possible anyway. When considering mass alone, life is quite efficient.

          According to Wolfram Alpha:

          The sun produces 3.8 * 1028 watts.

          A single human produces 104 watts (calculated through the average caloric intake assuming that intake ≈ energy consumption) through heat radiation.

          Therefore:

          1 kg of human converts 1.5 watt into heat.

          1 kg of the sun converts 0.0002 watt into (heat) radiation.

          And while I have nearly no understanding how entropy is calculated, from those values alone it seems like humans produce more entropy per kg than the sun. I’m pretty sure entropy is somewhat related to energy production though.

          • vithigar@lemmy.ca
            link
            fedilink
            English
            arrow-up
            1
            ·
            4 months ago

            Yes, if you consider just a human-mass equivalent portion of the Sun then it’s not doing much, but that’s not really a useful comparison. We’re talking about total net entropy here, not entropy per unit mass.

            But yes, if it makes you feel any better, I’ll concede that if you had octillions of people our total metabolic energy output would, in fact, be significantly higher than that of the Sun.

            • Buddahriffic@lemmy.world
              link
              fedilink
              English
              arrow-up
              1
              ·
              4 months ago

              This raises the question of how many kg of human mass is required to start fusion and create a human star? How does fusion even work if you have a mix of different elements? Would the human star pulse in a cycle of collapsing until hydrogen fusion starts, exploding out until it stops and then collapsing again? Or would any fusion ignite enough to stop it from collapsing into a neutron star or black hole?

              And if I’ve asked this question, does it mean xkcd has already attempted an answer? Or at least a comic that mentions it?