xkcd #3047: Rotary Tool

Comments

• Cocodapuf@lemmy.world ⁨1⁩ ⁨week⁩ ago

  TIL, I can totally enrich uranium with a modified dental drill.

  Well, I’m off to start a new project, I’ll let everyone know how it goes.

  source
• Magister@lemmy.world ⁨1⁩ ⁨week⁩ ago

  Isn’t record 78rpm instead of 72rpm?

  source

  • Hope@lemmy.world ⁨1⁩ ⁨week⁩ ago

    Yes.

    source

    • Blum0108@lemmy.world ⁨1⁩ ⁨week⁩ ago

      It’s probably a PAL record instead of NTSC.

      source
  • Klear@sh.itjust.works ⁨1⁩ ⁨week⁩ ago

    You’d think the WR would a lot higher…

    source
  • AnUnusualRelic@lemmy.world ⁨1⁩ ⁨week⁩ ago

    A lot of people won’t notice the difference.

    source
• EmoDuck@sh.itjust.works ⁨1⁩ ⁨week⁩ ago

  “Sidereal” pronounced /saɪˈdɪəriəl, sə-/ sy-DEER-ee-əl, sə-

  source

  • funkless_eck@sh.itjust.works ⁨1⁩ ⁨week⁩ ago

    meaning “of the stars” (from Latin, as opposed to Astral from the Greek)

    used in modern English in “consider” (literally: with the stars, meaning to scrutinize the sky).

    source

    • Revan343@lemmy.ca ⁨1⁩ ⁨week⁩ ago

      Subscribe

      source

      • -> View More Comments
    • RizzRustbolt@lemmy.world ⁨1⁩ ⁨week⁩ ago

      What would the bird version of “consider” be?

      Conavis?

      source
  • toyvo@programming.dev ⁨1⁩ ⁨week⁩ ago

    I get I never learned phonetics but how tf do you pronounce upside down e

    source

    • kholby@lemmy.world ⁨1⁩ ⁨week⁩ ago

      It’s the phonetic symbol for schwa, which is like a relaxed “uh” sound.

      source

      • -> View More Comments
  • InFerNo@lemmy.ml ⁨1⁩ ⁨week⁩ ago

    Like ethereal

    source
  • Pulptastic@midwest.social ⁨1⁩ ⁨week⁩ ago

    Side real

    source
• devilish666@lemmy.world ⁨1⁩ ⁨week⁩ ago

  300 RPM for screwdriver ??? I guess it’s electric/machine ones, because no one in gods green earth can turn regular screwdriver 300 RPM

  source
• moistclump@lemmy.world ⁨1⁩ ⁨week⁩ ago

  Stupid question… are these RPMs true??

  source

  • intelisense@lemm.ee ⁨1⁩ ⁨week⁩ ago

    Everything in XKCD is based on truth. That’s what makes it so funny… to geeks, at least.

    source

    • sanguinepar@lemmy.world ⁨1⁩ ⁨week⁩ ago

      He also put 33 instead of 33 and ⅓. Get the pitchforks!

      source

      • -> View More Comments
    • schnurrito@discuss.tchncs.de ⁨1⁩ ⁨week⁩ ago

      He’s made typos a few times in the past too: explainxkcd.com/wiki/index.php?search=typo&title=…

      source
  • felbane@lemmy.world ⁨1⁩ ⁨week⁩ ago

    Maybe I’m dense but shouldn’t the clock be:

    • H: 0.01667
    • M: 1
    • S: 60

    source

    • SoGrumpy@lemmy.ml ⁨1⁩ ⁨week⁩ ago

      Yes, you’re dense lol. The speeds are correct: the second hand that does one full Revolution Per Minute, the minute hand does one full Revolution Per Hour and the hour hand does one Revolution Per 12 Hours.

      source
    • Rev3rze@feddit.nl ⁨1⁩ ⁨week⁩ ago

      Oh my god I’m full of caffeine and still wondered this same thing. In my defense it’s Friday afternoon and I’m tired.

      source
  • KingRandomGuy@lemmy.world ⁨1⁩ ⁨week⁩ ago

    The sidereal telescope mount one seems to be right (approx 1 rotation per day).

    source
• Tar_alcaran@sh.itjust.works ⁨1⁩ ⁨week⁩ ago

  Wow, dental drills spin stupidly fast. I never realized they’re jamming something in my mouth that makes a turbopump seem sluggish, and that makes the scariest laboratory centrifuge I’ve ever seen blush in shame.

  source

  • TheOakTree@lemm.ee ⁨1⁩ ⁨week⁩ ago

    Big centrifuges are quite scary. Think of how much mass they are moving at those speeds. In comparison, a small drillbit turbine being rotated by compressed air seems less scary.

    source

    • Tar_alcaran@sh.itjust.works ⁨1⁩ ⁨week⁩ ago

      The scariest lab centrifuge i’ve personally seen went to something like 100k rpm, and 800,000 g. It’s basically a cartoon safe with a piece of lab equipment inside, because when something fails at 800,000 times the force of gravity, it’s going to end up outside the city borders, or inside the next building over.

      source
  • Wogi@lemmy.world ⁨1⁩ ⁨week⁩ ago

    I occasionally run a lathe at work. The big CNC one says it will do 10,000 rpm

    If you ever run it that fast, the jaws will start to separate and the part will come flying out at Mach 4, bounce around the inside of the machine for several minutes, destroying the chuck, all the tooling, and the chip conveyor in the process.

    Another fun fact, these machines go from 5000 rpm (the fastest you’re assuredly safe to run it) to 10 at the snap of a finger and back up again. All of that energy has to go somewhere. So there’s a heat coil, pretty much identical to the one in your oven, that takes all that extra energy. It doesn’t normally get all that hot, but if you’re running a lot of parts with a lot of diameter changes, it can get hot enough to glow.

    source