• 0 Posts
  • 21 Comments
Joined 1 year ago
cake
Cake day: June 4th, 2023

help-circle


  • I personally think it’s just fine if you forget it’s about time shenanigans and forget anything ever mentioned in a modern physics paper.

    I get much of my enjoyment out of doing the opposite; pushing the narrative with “what-ifs” and seeing how far I can twist my understanding of reality to make the story plausible, so I very much didn’t have a good time.







  • Horsepower isn’t a measure of how much power one horse can produce at any time, but rather over an entire day. It’s roughly the number of horses an engine could replace running 24/7.

    Running a horse at 15 horsepower would tire it out rather quickly, so you’d need many teams of horses rotated around to maintain 15 horsepower.



  • I agree it needs to be more clearly defined, but one of the reasons it wasn’t clearly defined was because mathematicians thought it was so universal it didn’t need defining, like how parentheses work to begin with.

    Casio tried not doing umplicit multiplication after some american teachers complained, then went back to doing it after everyone else complained. Implicit multiplication is the standard.




  • Implicit multiplication being before regular multiplication/division is so we can write 2y/3x instead of (2y)/(3x). Without priority, 2y/3x becomes (2y÷3)•x.

    Coefficients are widely used enough that mathematicians don’t want to write parentheses around every single one. So implicit multiplication gets priority.



  • BEDMAS: Bracket - Exponent - Divide - Multiply - Add - Subtract

    PEMDAS: Parenthesis - Exponent - Multiply - Divide - Add - Subtract

    Firstly, don’t forget exponents come before multiply/divide. More importantly, neither defines wether implied multiplication is a multiply/divide operation or a bracketed operation.


  • The limits of “hot” and “cold” change with location and personal experience. 0°F is shorts weather for some, while 70°F is jacket time for others. Both live in my neighborhood.

    There are hundreds of millions of people who see negative double digits every year, and billions of people who have never seen snow (Mumbai has never seen below 50°F!). There is no scale that can claim to cover human’s experience of temperature in general, but some scales can be useful.

    The exact numbers don’t matter to people anyway, no one sees 70°F and estimates 70% hot, just like most of the world knows what 22°C means, even if it never freezes there. We could measure in yoctojoules (40.7) or simply relative to what the pope feels is hot and cold (85?). For daily use all temperature scales are arbitrary. Why not use one that’s useful?


  • Hard disagree. 0°F is colder than the pont it stopped being cool, but not yet really cold. 100°F is many degrees into dying of melting, but also a few degrees short of a fever worth noting.

    I don’t think I’ve ever seen either 0°F or 100°F used in any way to refer to actually temperature. It’s always defining the scale or comparing to °C. Maybe once when checking for a fever.


  • And I will continue to assail your hill with; wet is a property that water has.

    Wet is simply the surface tension balance of a substance. If a fluid sticks to somthing, it is wet. You can wet your brush, yes, but also wet a soldering iron, or wet every surface with superfluid. Wet refers to the conducting of fluid, capillary action, all the effects of surface tension adhering to something.

    How wetting a substance is of another substance is usually measured by the angle a droplet makes upon contact. More sticky (adhesive) and less blobby (cohesive) means more wetting. Cohesion being simply self-adhesion means any fluid with surface tension necessarily totally wets itself, otherwise it’s a gas. And since water is a cohesive liquid (with a rather strong surface tension), it is by definition wet.


  • And yet the printer was remotely disabled. If the ink is such an intrinsic part of the printer that the printer can’t be used independently, than it may as well be the same thing.

    You’re not renting the car, just the keys!

    All our hotel rooms are free for everyone! Access isn’t though, sorry.

    $0 phones! Only works with Comcast though…