Yes, that Sasha 🍉

Non-binary 🏳️‍⚧️⬛🟪⬜🟨🏳️‍⚧️
They/them

Anarchist/your local idiot with a guitar

If you’re an Aussie

If you eat food

And if you live on Earth

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Joined 11 months ago
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Cake day: December 12th, 2023

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  • Possibly?

    A bowling ball is more dense than a feather (I assume) and that’s probably going to matter more than just the size. Things get messy when you start considering the actual mass distributions, and honestly the easiest way to do any calculations like that is to just break each object up into tiny point like masses that are all rigidly connected, and then calculate all the forces between all of those points on a computer.

    I full expect it just won’t matter as much as the difference in masses.


  • I actually thought the answer might be never, but a quick back of the envelope calculation suggests you can do this by dropping a ~1kg bowling ball from a height of 10-11m. (Above the surface of the earth ofc)

    This is an extremely rough calculation, I’m basically just looking at how big a bunch of numbers are and pushing all that through some approximate formulae. I could easily be off by a few orders of magnitude and frankly I didn’t take care to check I was even doing any of it correctly.

    10-11m seems wrong, and it probably is. But that’s still 1,000,000,000,000,000,000,000,000 times further than the earth moves in this situation. Which hey, fun What If style fact for you: that’s about the same ratio of 1kg to the mass of the Earth at ~1024kg.

    That makes perfect sense because the approximations I made are linear in mass, so the distance ratio should be given by the mass ratio.



  • If anyone’s wondering, I used to be a physicist and gravity was essentially my area of study, OP is right assuming an ideal system, and some of the counter arguments I’ve seen here are bizarre.

    If this wasn’t true, then gravity would be a constant acceleration all the time and everything would take the same amount of time to fall towards everything else (assuming constant starting distance).

    You can introduce all the technicalities you want about how negligible the difference is between a bowling ball and a feather, and while you’d be right (well actually still wrong, this is an idealised case after all, you can still do the calculation and prove it to be true) you’d be missing the more interesting fact that OP has decided to share with you.

    If you do the maths correctly, you should get a=G(m+M)/r^2 for the acceleration between the two, if m is the mass of the bowling ball or feather, you can see why increasing it would result in a larger acceleration. From there it’s just a little integration to get the flight time. For the argument where the effect of the bowling ball/feather is negligible, that’s apparent by making the approximation m+M≈M, but it is an approximation.

    I could probably go ahead and work out what the corrections are under GR but I don’t want to and they’d be pretty damn tiny.







  • I don’t like commercial “AI” period.

    That said, I did find some use for chatGPT last year. I had it explain to me some parts of Hawking’s paper on black hole particle creation, this was only useful for this one case because Hawking had a habit of stating something is true without explaining it and often without providing useful references. For the record, chatGPT was not good at this task, but with enough prodding and steering I was eventually able to get it to explain some concepts well enough for my usage. I just needed to understand a topic, I definitely wasn’t asking chatGPT to do any writing for me, most of what it spits out is flat out wrong.

    I once spent a day trying to get it to solve a really basic QM problem, and it couldn’t even keep the maths consistent from one line to another.


  • Sasha@lemmy.blahaj.zonetoLefty Memes@lemmy.dbzer0.comAmerica is ratchet
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    5 days ago

    Innuendo Studios has a good video on this in their alt right playbook series. Republicans will gladly appeal to the far right, Democrats want to distance themselves from the left as much as possible and are instead focused on also appealing to the right…

    Ultimately, while a lot of the parties policies are different on the surface, Democrats still win when Republicans are in power because they’re part of the same class, hoarding wealth works for both sides. Democrats seemingly only exist to make the system vageuly stomachable (is that even a word?) to the rest of America.