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Joined 1 year ago
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Cake day: July 4th, 2023

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  • NielsBohron@lemmy.worldtomemes@lemmy.worldHole y Moly
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    2 months ago

    You know what? Now that you mention it, I think reading that story in the Dulaires book of Greek myths was my first conscious exposure to the word “sieve.”

    Not that that’s too interesting to anyone besides me, but you just unburied a long-forgotten pleasant memory, so thanks!





  • I’m approaching 40 and have three kids from 10yo to 1yo, and I’m still going to encourage them going to college, but in a way that makes sense for them. My wife and I both work at a community college, and there’s no way our kids are going to go to a 4-year right out of high school (unless they get a full scholarship for something and already know exactly what they want to do).

    Too many students don’t know what they want to study, don’t value the education, and drive themselves into too much debt. While I highly value the education and skills gained in a bachelor’s program, there’s no need to be going into debt at a university to take first- and second-year courses when community colleges are effectively free (in CA, anyway)



  • NielsBohron@lemmy.worldtoMemes@sopuli.xyzA bad influence
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    2 months ago

    It’s useful for me to keep track chat conversations with coworkers, but it doesn’t really do anything that Discord can’t. It just has the benefit of being pre-installed on our work computers and it already has everyone’s contact info (plus then I don’t need to juggle multiple Discord accounts or teach my Boomer coworkers about Discord). Especially since I work in a building and location that has little to no cell service inside the building, it’s nice to be able to get ahold of people in a faster and less formal way than email.

    But for any of the other advertised functions, it’s trash.


  • So, one observer will see those oscillations happen faster than the other?

    Not quite. In each observer’s frame of reference, time appears to pass the same; it’s only when you try to reconcile the between two objects that are not at rest with respect to each other does relativity show up.

    Basically, when you bring someone back to Earth, the observers will find that their watches don’t match up even though both observers experience time passing the same way as normal (because the oberserver is by definition at rest with respect to their own frame of reference).

    TL; DR: Relativity is a pain in the ass and makes no sense in everyday terms.

    edit: disclaimer - I am not a physicist and have not taken physics classes in a decade plus, but I do teach science at a college. I’m going mostly on half-remembered lectures and some random one-off discussions I’ve had with my buddy in the physics department over the past few years.



  • It’s been a long time since I took modern physics, so I’m not positive, but I think you’re right that the moon would have time moving slower, and if your 50ms/day is right (edit: I based this on the moon traveling faster than the earth, but I don’t know anything about gravitational relativity, so that’s probably wrong) then you’d need to do something like skip a second every 20th day on the moon to keep pace with Earth. We could call it an “anti-leap-second”

    Programmers, that seems pretty simple; what’s the big deal? /s


  • No, the moon’s rotation isn’t on a 24-hour cycle. I’m not an astronomer, but I pretty sure since it’s tidally locked to earth and on a 28-day cycle around the earth, a lunar day is actually 28 Earth days, but I’m not actually sure how that would factor into the number of time zones (I’m pretty sure it would be more complicated than just 24 time zones to match 24 time zones on earth, though).

    Plus, I think the speed of the moon relative to the sun is different enough from Earth that you need to take relativity into effect, which is the real headache here.