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
  • 8 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.







  • @agressivelyPassive @technom That’s a self-fulfilling prophecy, IMO. Well-structured commit histories with clear descriptions can be a godsend for spelunking through old code and trying to work out why a change was made. That is the actual point, after all - the Linux kernel project, which is what git was originally built to manage, is fastidious about this. Most projects don’t need that level of hygiene, but they can still benefit from taking lessons from it.

    To that end, sure, git can be arcane at the best of times and a lot of the tools aren’t strictly necessary, but they’re very useful for managing that history.