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| 01:12:56 | <G4te_Keep3r> | ansi code domain? |
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| 02:26:05 | | Doranwen attempted to find an svg of a two-sided scale (y'know, the kind children can put small stuff in to compare weights of two sides) on Wikimedia Commons - other than a smattering of "scales of justice", the results quickly turned into bunch of musical scales and a horde of "human compared to dinosaur" graphics, lol |
| 02:26:19 | <Doranwen> | I should've expected the musical scales |
| 02:26:28 | <Doranwen> | the dinosaur ones surprised me |
| 02:27:50 | <Doranwen> | I may need to just give up - I wanted something like this, but lopsided and not perfectly in balance: https://publicdomainvectors.org/en/free-clipart/Balanced-scale/50249.html |
| 02:31:26 | <@JAA> | I assume you already looked through https://commons.wikimedia.org/wiki/Category:Weighing_scales and its subcategories? |
| 02:38:41 | <Doranwen> | I had not yet! I'm not used to poking through Wikimedia Commons, tbh |
| 02:38:49 | <Doranwen> | I've been finding my pics on publicdomainvectors, for what I'm working on |
| 02:39:36 | <Doranwen> | and there, a search for "scale" results in a lot closer to the stuff I want, because it doesn't have all the musical scale and dinosaur pics |
| 02:39:54 | | Doranwen specifically needs b&w svgs |
| 02:39:59 | <@JAA> | I tend to search for a Wikipedia page that describes what I'm looking for. Then normally there's a link to Commons at the bottom if there is an associated category. |
| 02:40:21 | <@JAA> | Eh? SVGs are easy to edit. They're awesome. :-) |
| 02:41:24 | <Doranwen> | I'm converting them to odgs and dumping into LibreOffice, is why |
| 02:42:01 | <@JAA> | So? |
| 02:42:12 | <@JAA> | You can still edit the SVG before that conversion to remove colours etc. |
| 02:42:19 | <Doranwen> | oh, I was explaining why I wanted svgs and not raster |
| 02:42:24 | <Doranwen> | I have no idea how to edit svgs |
| 02:42:29 | <@JAA> | Inkscape |
| 02:42:37 | <Doranwen> | all I've learned to do in Inkscape is Save As an odg, lol |
| 02:42:56 | <Doranwen> | (and in a couple cases when I tried that, the odg is completely blank, NO idea why) |
| 02:43:15 | <@JAA> | Well, I'll admit it's not the most intuitive interface. Then again, none of these softwares ever are because there's just too many things you can do, so it always gets messy. |
| 02:43:49 | | Doranwen nods |
| 02:44:20 | <Doranwen> | normally I might try searching for help guides, but when one has to reload a webpage 10-20 times to get it to load… yeah, I've hit my frustration level enough to avoid that one, lol |
| 02:44:25 | <Doranwen> | some sites do much better than others |
| 02:44:40 | <Doranwen> | and oddly enough, duckduckgo searches are *really* troublesome |
| 02:44:46 | <@JAA> | Ah yeah, your poor internet connection. :-| |
| 02:44:53 | <Doranwen> | publicdomainvectors and Wikimedia are no problem at all |
| 02:44:59 | <@JAA> | Cable not laid yet? |
| 02:45:03 | <Doranwen> | yeah, it was better for a while, and now it's worse again |
| 02:45:05 | <Doranwen> | nope |
| 02:45:07 | <Doranwen> | my dad's bugging them |
| 02:45:25 | <Doranwen> | but at this rate, it'll be another month or two before we have it |
| 02:45:29 | <Doranwen> | and I'm SO tired of this, lol |
| 02:45:39 | <Doranwen> | anyway, I just learn what I can and can't do |
| 02:45:44 | <Doranwen> | and what's doable but takes patience |
| 02:45:54 | <Doranwen> | and avoid the last as far as possible |
| 02:46:05 | <Doranwen> | which means, if I can avoid searching for something, best to do that |
| 02:47:19 | <Doranwen> | all I'm finding in those categories is pretty much photos |
| 02:48:00 | <Doranwen> | this is the only one that depicts the sort of scale I'm looking for: https://commons.wikimedia.org/wiki/File:El_mundo_f%C3%ADsico,_1882_1004074_%284030997843%29.jpg |
| 02:48:52 | <Doranwen> | and the picture, besides being balanced and not lopsided (the one from publicdomainvectors is a perfect balanced one, nothing to tweak there), is way too much shading and lines to work even if it were an svg |
| 02:49:08 | <Doranwen> | I think I'd better just work around that |
| 02:49:13 | <Doranwen> | probably not going to find one |
| 02:49:57 | <Doranwen> | I did find a perfect die, though - publicdomainvectors didn't, Wikimedia Commons did |
| 02:51:01 | <@JAA> | https://commons.wikimedia.org/wiki/File:Balance_(PSF).jpg ? |
| 02:51:06 | <@JAA> | Not SVG though, sadly. |
| 02:52:08 | <Doranwen> | nope, I was looking for an empty one so I could put my own stuff on it |
| 02:52:09 | <Doranwen> | but that's OK |
| 02:52:11 | <Doranwen> | I don't need that |
| 02:52:20 | <Doranwen> | I'll redesign what I'm working on so I can avoid it |
| 02:52:33 | <Doranwen> | would've been nice, but I don't think one exists |
| 02:53:57 | <@JAA> | An empty lopsided scale of this kind would be broken, wouldn't it? |
| 02:54:04 | <@JAA> | So kind of makes sense that it might not exist. |
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| 02:58:31 | <Wayward> | or they're so fine tuned, that the localized differences in air pressure and gravitational field strength is enough to tip the scales |
| 03:02:06 | <G4te_Keep3r> | the low side is hanging out of the antigravitational field? |
| 03:26:32 | <Doranwen> | LOL |
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| 04:01:36 | <atphoenix> | Gravitational fields vary slightly over the earth depending on the nearby mass. Search for "gravitational field strength map". If you have a sufficiently large balance, I suppose you could get the two ends in different gravitational field strength areas. Likewise, if you have a sufficiently large lever you can move the earth off the back of the turtle upon which it sits. :D |
| 04:14:38 | <@JAA> | Also, if you're near the ocean, you need to be extra careful because the tides may affect your balance. :-) |
| 04:15:14 | <@JAA> | (Now I wonder whether that change is actually measurable.) |
| 04:19:49 | <Wayward> | The Kilogram is being held in an underground vault somewhere in a remote village in France, so it can be weighed without influence from trucks and trains. |
| 04:20:41 | <G4te_Keep3r> | wouldnt it be cool to have a long enough one that was in line with moon's path so it would go from balanced to one side down across to other side down to balanced...but that arm would need to be massive |
| 04:20:56 | <@OrIdow6> | Didn't thet redefine it in terms of physical constants a year and a half or so ago? |
| 04:22:03 | <G4te_Keep3r> | https://www.wired.com/story/new-kilogram-definition-based-on-planck-constant/ |
| 04:22:25 | <@OrIdow6> | And according to Wikipedia, it was only stored ~10 km from Paris |
| 04:22:31 | <G4te_Keep3r> | "Scientists have now scrapped all physical objects from the system. The units are instead based on fundamental constants of nature. For example, the meter has been defined in terms of the speed of light. This means that as long as you can measure the speed of light, you can create a meter stick; you don’t need access to a special object." |
| 04:22:36 | <@OrIdow6> | "The center of Paris", that is |
| 04:26:18 | <G4te_Keep3r> | not sure why i copied the distance part when we're talking about weight. "Perhaps the biggest change was in the definition of the kilogram, which was the last remaining unit to be based on a physical artifact: the International Prototype Kilogram, also known as Le Grand K, locked in a vault in a Paris suburb. While scientists will still monitor and |
| 04:26:19 | <G4te_Keep3r> | study Le Grand K, it no longer has its former scientific significance. Now, it’s just a cylinder with a lot of history. Starting in May, the kilogram will be defined in terms of Planck’s constant, a number that relates a radio wave’s energy to its frequency." |
| 04:26:19 | <G4te_Keep3r> | "The system was due for an upgrade, says Abbott. The French cylinder tends to gain weight over time." i should use that next time i have to talk to a doctor ;p |
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| 07:54:40 | <Wayward> | TikTok being sued for billions, possibly trillions in damages, in the UK and EU for violating childrens' privacy. Each of millions of children could receive substantial reward. |
| 07:55:58 | <Wayward> | I'm still waiting on my Yahoo money. |
| 08:01:41 | <Wayward> | > 44% of all eight to 12-year-olds in the UK use TikTok, despite its policies forbidding under-13s on the platform. |
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| 09:00:56 | <thuban> | atphoenix, G4te_Keep3r: i'm not aware of any tide-demonstrating balance, but there is (was?) at least one which is affected by inequality in local gravitational fields :) |
| 09:00:59 | <thuban> | "For many years, A.A. Michelson showed to visitors an equal-arm balance that he had set up in Ryerson Physical Laboratory at the University of Chicago. The pan on one arm was located on the third floor of the building while the pan on the other arm was suspended by a much longer linkage and was located in the basement. Michelson could readily show that this instrument was |
| 09:01:02 | <thuban> | balanced only when the masses in the two pans were (slightly) unequal." |
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| 09:05:20 | <thuban> | (michelson is best known for experimental evidence against the existence of a luminiferous aether and his work on the speed of light. the interferometer he invented is still used today; he won the nobel for it) |
| 09:11:32 | <G4te_Keep3r> | slightly unequal to account for the difference in length of chain? |
| 09:15:46 | <thuban> | ? rephrase? |
| 09:24:12 | <G4te_Keep3r> | "balanced only when the masses in the two pans were (slightly) unequal" -> was that unequal amount the difference in weight from the short and long linkage ("the other arm was suspended by a much longer linkage"). Like the difference in weight of a short and long linkage. |
| 09:27:38 | <thuban> | unfortunately i'm unable to find more details on the construction, but i assume (michelson being well qualified at this sort of thing) that the balance was built in such a way as to account for that, and that the inequality genuinely demonstrated the difference in gravitational force due to r^2 |
| 09:35:13 | <G4te_Keep3r> | now that makes it so much more interesting. Not sure why my mind grabbed onto that saying longer linkage so hard. We need more touring shows/demo things/museum exhibits with crazy contraptions like that and strandbeest...well with that balance one maybe not touring with the gravity variances across earth. Definitely adding that guy to my list of |
| 09:35:13 | <G4te_Keep3r> | things to research. |
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| 17:52:44 | <@JAA> | thuban, G4te_Keep3r: Interesting. That's the vertical difference in gravity then I guess, which makes sense and should be much easier to demonstrate than the horizontal gradient I guess. |
| 17:57:00 | <@JAA> | You only need a vertical difference of roughly 5 metre to get a difference in g of around 1 ppm, which should already be readily detectable. |
| 18:02:15 | <@JAA> | The horizontal variation extremes are on the order of 0.0005 m/s^2 (https://commons.wikimedia.org/wiki/File:Gravity_anomalies_on_Earth.jpg ), but it's pretty smooth. I guess near the Himalaya might be one of the strongest gradients, and even there it's only 0.001 m/s^2 across a couple hundred km. That's two orders of magnitude smaller than the vertical gradient or so. |
| 18:02:19 | <spirit> | when you 7z that huge file on your remote server, then do a rsync including the original and realise that network speed is a magnitude better than compression speed |
| 18:02:50 | <@JAA> | spirit: `rsync -z` |
| 18:03:05 | <spirit> | :x |
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| 18:03:37 | <@JAA> | But yeah, depends strongly on what you're transferring whether it's useful. |
| 18:04:27 | <spirit> | on the topic of gravity, did you know that the GRACE mission has spacecraft measuring their distance at about 5 micrometers over a distance of 220 kilometers? https://en.wikipedia.org/wiki/GRACE_and_GRACE-FO |
| 18:05:32 | <spirit> | wait wtf, GRACEFO does up to 200 pm |
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| 18:06:38 | <@JAA> | Indeed. Awesome project! |
| 18:06:56 | <@JAA> | That map above is from GRACE actually, I think. |
| 18:07:17 | <@JAA> | Yup, description confirms that. :-) |
| 18:07:20 | <spirit> | most definitely |
| 18:07:22 | <spirit> | :D |
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