• NorthWestWind@lemmy.world
    93·
    10 months ago

    Every 1 minute, 3L of water gets heated by 50K. With a specific heat capacity of 4200 J / kg / C and density of 1 g / mL, it takes 3 x 4200 x 50 = 630000J per minute.

    With a rate of 4.0 x 10^4 J / g for the heater, we can get the rate of combustion with 630000 / 40000 = 15.75 g per minute.

  • Vespair@lemm.ee
    7821·
    10 months ago

    Kanye is a literal admitted Nazi.

    Stop dickriding this fucking loser or using him in memes like he’s just some dude. Stop being complicit in normalizing Nazism, Jesus fucking Christ

    • hughesdikus@lemmy.ml
      147·
      10 months ago

      Just because the guy in memes is a jerk doesnt mean we cant laugh at memes.

      There are literal Hitler memes on the internet.

      Do you think people who put Satan in their memes want to really go to hell or something?

      • Vespair@lemm.ee
        114·
        10 months ago

        Of course I understand that, but I also understand subtext and cultural currents. Regardless of whether or not using Kanye this way counts as endorsement, it still serves to normalize his relevance and help keep him, and therefore his thoughts, words, and opinions, in the cultural zeitgeist.

        So we can either accept that or choose literally any other random idiot to be our go-to meme guy instead.

        So why the fuck shouldn’t we?

        • insufferableninja@lemdro.idEnglish
          21·
          10 months ago

          i laughed at the meme, and didn’t know who the dude was. so maybe it’s not as big a problem as you think? shrug

        • hughesdikus@lemmy.ml
          11·
          10 months ago

          You should spread awareness on why he is a jerk instead of just trying to supress his existence as a whole.

          That will help people to get the complete picture instead of just “oh dont use this picture”. That’s how information works.

          Believe it or not, there are still many people who dont know, thus don’t care about him or his thoughts. And you writing something instead of all this would have helped your cause more.

  • prime_number_314159@lemmy.world
    33·
    10 months ago

    You have 3 liters of water heating up by 50 degrees celsius. It takes 4184 joules to heat 1 liter of liquid water by one degree Celsius, so it takes 627600 joules to heat 3 liters by 50 degrees. Dividing by 40000 joules per gram of fuel, it will take 15.69 grams of fuel per minute. Finally, for significant digits, we have to round to 16. grams of fuel per minute.

    Edit: for most sciency uses, 1.6 times 10^1 grams of fuel per minute is likely the preferred way to write that.

      • AirBreather@lemmy.world
        21·
        10 months ago

        Its going from 7 to 77, not 57

        “from 2 7°C to 77°C” is either “from 27°C to 77°C” with an extremely problematic line break position, or something unintelligible.

    • platypus_plumba@lemmy.world
      1·
      10 months ago

      Hey, just curious… when you say that it takes a specific amount of joules to heat water, why is the time variable, surface area of the body of water and surrounding temperature ignored? It seems so weird to me to hear that it takes a fixed amount of energy to heat water from temperature A to temperature B. I feel there are so many more variables involved.

      Are you just ignoring variables for the sake of being able to give an answer? Seems to me like a classic scenario of “they taught me to ignore these variables in physics class”. Or am I wrong? I’m very curious. I was trying to solve it logically but it wasn’t possible due to missing variables. I have no clue about thermodynamics.

      • prime_number_314159@lemmy.world
        3·
        10 months ago

        I’m ignoring many factors for the sake of being able to answer. There are some kinds of heating, especially using burning fuels that are nearly 100% efficient, but we don’t know why it needs to get to that temperature, or how long it needs to stay that hot - so even if the transfer of heat is 100% efficient, this computation may underestimate the actual needs.

        • platypus_plumba@lemmy.world
          1·
          10 months ago

          Ah, alright, I was feeling dumb because the formulas made no sense to me but it is just a model providing a practical approximation. Thanks!

    • Gork@lemm.ee
      4·
      10 months ago

      Yes. BTUs are of the devil.

      Source: have worked with thermodynamic Freedom units and they’re awful.