As the title says. I’m actually thinking about this hard with my friends because everything that’s produced on Earth stays on Earth so it doesn’t change size, but what if it’s not from Earth but it stays on Earth?

  • @tobogganablaze
    link
    English
    4
    edit-2
    2 months ago

    I have no clue what units that c2 formula are actually in 😕

    c is the speed of light, so you can use any distance over time unit. But most commonly it’s given as 299 792 458 m/s

    Like we could define our own units such that 1 unit of e equals 1 unit of m.

    So you can’t since m is multiplied by c and c isn’t equal to 1.

    • @ccunning@lemmy.world
      link
      fedilink
      12 months ago

      Oof - I have to rethink everything I thought I knew about E=mc2 🫠

      I’ve always discounted c2 as “just a number” and didn’t consider it was a number of specific units 🫣

      • @tobogganablaze
        link
        English
        42 months ago

        I’ve always discounted c2 as “just a number” and didn’t consider it was a number of specific units 🫣

        This is actually very common and I even remember physics teacher basically using the words “don’t worry about it, it’s just a really big number”, because their point was to imaging the big amount of energy you could get from very little mass.

        But I mostly blame old documentaries about atom bombs that just threw in the absolute basics to make what is basically explosion porn.

        • @ccunning@lemmy.world
          link
          fedilink
          22 months ago

          I even remember physics teacher basically using the words “don’t worry about it, it’s just a really big number”

          Ok - This is literally the origin for me. My 8th grade “physical science” teacher told us this.

          • @tobogganablaze
            link
            English
            52 months ago

            My 8th grade “physical science” teacher told us this.

            Yeah, that checks out. It is an interesting concepts that can peak student’s curiosity, but to early to really get into quantum mechanics. So for people that don’t further pursue an interest in physics, that’s often the last impression they are left with.

            I had the fortune to have a physics professor as a dad. I carried a laminated double sided periodic table since elementary school. We didn’t even have chemistry of physics until secondary school …