Large sheep the size of a small sheep! Late 20’s queer sysadmin, release engineer and programmer. Likes tea, DIY, and nerd stuff. Follow requests generally accepted but please have a filled out profile first!

  • 0 Posts
  • 33 Comments
Joined 2 years ago
cake
Cake day: December 4th, 2022

help-circle


  • @SorteKanin

    This also explains why evaporation cools down (like when you sweat): the molecules with the highest temperature are the ones evaporating, so the average temperature decreases as those high-temperature molecules leave the system. Only the relatively colder molecules are left behind - thus it cools as a whole.

    The main principle at work here is the enthalpy of vaporization. When matter changes state, there is an associated amount of energy that is absorbed or released - in the case of vaporization, energy must be absorbed. So when sweat forms on your skin and evaporates, it absorbs heat energy from your body in order to undergo that state change.

    For water, the energy involved here is remarkably high, much higher than the energy stored by a few degrees difference in temperature. For example, if you wanted to boil off 1kg of water, it would take about 300 kJ to bring the temperature up to boiling from room temperature and over 2000 kJ to boil it all into steam.


















  • @remington There are few creators whose videos I will jump to view the instant they drop, and Lemmino is one of them. This is a pretty interesting subject that I haven’t heard of, despite it apparently being quite well-known.

    Tbh, Sanborn not being confident/experienced with math and cryptography kinda tracks with his apparent surprise that expert cryptographers cracked a Vigenere cipher in a couple days rather than follow an obscure breadcrumb trail that’s still unclear, even after knowing the key. For me, K4’s enduring mystery prompts comparison to the Zodiac killer ciphers, which ended up being so difficult to unwind not because they were brilliant ciphers devised by a mastermind, but because the author made a bunch of mistakes. Still, at this point it seems likely that Sanborn has checked his work over multiple times, so maybe there really is just some trick that no one has thought of. He’s clearly eager for it to be solved, so we may know in the coming decades!