Editing Talk:2073: Kilogram
Please sign your posts with ~~~~ |
Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.
The edit can be undone.
Please check the comparison below to verify that this is what you want to do, and then save the changes below to finish undoing the edit.
Latest revision | Your text | ||
Line 1: | Line 1: | ||
<!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.--> | <!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.--> | ||
− | |||
− | |||
I didn't know that weights and currencies could be converted 1:1, that's cool! [[User:Fabian42|Fabian42]] ([[User talk:Fabian42|talk]]) 16:37, 16 November 2018 (UTC) | I didn't know that weights and currencies could be converted 1:1, that's cool! [[User:Fabian42|Fabian42]] ([[User talk:Fabian42|talk]]) 16:37, 16 November 2018 (UTC) | ||
I wish they ''had'' redefined the kilogram a little bit. It would have been neat if 1 kg was exactly the weight of 1 dm^3 (1 litre) of water under one atmosphere of pressure. Right now it's soooo close. It's a good enough estimate for simple maths, but whenever you tell people that a litre of water weighs one kilogram the pedants comes out of the woodworks... [[User:Kapten-N|Kapten-N]] ([[User talk:Kapten-N|talk]]) 16:50, 16 November 2018 (UTC) | I wish they ''had'' redefined the kilogram a little bit. It would have been neat if 1 kg was exactly the weight of 1 dm^3 (1 litre) of water under one atmosphere of pressure. Right now it's soooo close. It's a good enough estimate for simple maths, but whenever you tell people that a litre of water weighs one kilogram the pedants comes out of the woodworks... [[User:Kapten-N|Kapten-N]] ([[User talk:Kapten-N|talk]]) 16:50, 16 November 2018 (UTC) | ||
− | |||
− | |||
:You'll get pedants whenever you refer to a kilogram as weight; it's a mass. The difference is that stuff weighs less on the Moon - or on tall mountains - although the mass is the same. I think the article as I just read it gets away with this. And, sure, what is the standard kilogram but a weight, that you take and weigh... [email protected] [[Special:Contributions/162.158.91.59|162.158.91.59]] 23:57, 16 November 2018 (UTC) | :You'll get pedants whenever you refer to a kilogram as weight; it's a mass. The difference is that stuff weighs less on the Moon - or on tall mountains - although the mass is the same. I think the article as I just read it gets away with this. And, sure, what is the standard kilogram but a weight, that you take and weigh... [email protected] [[Special:Contributions/162.158.91.59|162.158.91.59]] 23:57, 16 November 2018 (UTC) | ||
Line 15: | Line 11: | ||
::: No, it doesn't require an environment of precisely 1g, it relies on the fact that the effect of local gravity is well understood, can be measured precisely, and compensated for. It's a fundamental aspect of the Kibble balance and you can rest assured that it hasn't been overlooked by the physicists designing it! [[Special:Contributions/162.158.134.34|162.158.134.34]] 16:38, 17 November 2018 (UTC) | ::: No, it doesn't require an environment of precisely 1g, it relies on the fact that the effect of local gravity is well understood, can be measured precisely, and compensated for. It's a fundamental aspect of the Kibble balance and you can rest assured that it hasn't been overlooked by the physicists designing it! [[Special:Contributions/162.158.134.34|162.158.134.34]] 16:38, 17 November 2018 (UTC) | ||
::::Oh really? ''How'' would one precisely measure the local gravity? In kilograms of force? No, sorry. This is a bad method. It leads to an insoluble quandary & clearly either ''hasn't'' been thought through by its supporters, or is an intentional exploit. ''Actually'' fixing it to Planck's constant would be great, but a Kibble scale can't do that. Weighing mass against anything but another mass is foolish.[[User:ProphetZarquon|ProphetZarquon]] ([[User talk:ProphetZarquon|talk]]) 22:15, 19 November 2018 (UTC) | ::::Oh really? ''How'' would one precisely measure the local gravity? In kilograms of force? No, sorry. This is a bad method. It leads to an insoluble quandary & clearly either ''hasn't'' been thought through by its supporters, or is an intentional exploit. ''Actually'' fixing it to Planck's constant would be great, but a Kibble scale can't do that. Weighing mass against anything but another mass is foolish.[[User:ProphetZarquon|ProphetZarquon]] ([[User talk:ProphetZarquon|talk]]) 22:15, 19 November 2018 (UTC) | ||
− | |||
:::I'm very happy that measuring a kilogram accurately now may require EM shielding. EM shielding is far too rare nowadays, in this modern world of far-beyond-van-eck-phreaking. Anything that makes shielding more prevalent and widely understood is sorely needed. [[Special:Contributions/172.68.65.84|172.68.65.84]] 23:19, 20 November 2018 (UTC) | :::I'm very happy that measuring a kilogram accurately now may require EM shielding. EM shielding is far too rare nowadays, in this modern world of far-beyond-van-eck-phreaking. Anything that makes shielding more prevalent and widely understood is sorely needed. [[Special:Contributions/172.68.65.84|172.68.65.84]] 23:19, 20 November 2018 (UTC) | ||
Line 27: | Line 22: | ||
::The original proposition for a reproducible unit of mass (after the french Revolution, by Talleyrand) was that of the pound being the mass of a cubic foot of distilled water, Also the ''Grave'' (equal to our kilogram) was defined by the cubic decimetre of water by the French Commission of weights and measures in 1793. ("Le poid du pied cube d'eau étant ainsi connu, on a conclu celui du décimètre cube, ou la nouvelle unité de poids" https://books.google.nl/books?id=FufDNJHvgFEC p.274). So length and mass *were* interlinked by water. | ::The original proposition for a reproducible unit of mass (after the french Revolution, by Talleyrand) was that of the pound being the mass of a cubic foot of distilled water, Also the ''Grave'' (equal to our kilogram) was defined by the cubic decimetre of water by the French Commission of weights and measures in 1793. ("Le poid du pied cube d'eau étant ainsi connu, on a conclu celui du décimètre cube, ou la nouvelle unité de poids" https://books.google.nl/books?id=FufDNJHvgFEC p.274). So length and mass *were* interlinked by water. | ||
:Also, in E=mc², E is the energy '''at rest''' (for a stationary object of mass m), so your definition using the acceleration makes no sense.[[Special:Contributions/162.158.88.254|162.158.88.254]] 18:47, 16 November 2018 (UTC) | :Also, in E=mc², E is the energy '''at rest''' (for a stationary object of mass m), so your definition using the acceleration makes no sense.[[Special:Contributions/162.158.88.254|162.158.88.254]] 18:47, 16 November 2018 (UTC) | ||
− | |||
Actually, for the new definition of the kilo using the Kibble balance you need to measure the gravity... [[Special:Contributions/162.158.134.16|162.158.134.16]] 17:34, 16 November 2018 (UTC) | Actually, for the new definition of the kilo using the Kibble balance you need to measure the gravity... [[Special:Contributions/162.158.134.16|162.158.134.16]] 17:34, 16 November 2018 (UTC) | ||
Line 50: | Line 44: | ||
Ok, I'm going to point out something. What's a meter? 1000 milimeters. What's a milimeter? .....skipping the questions all the way to the end, the answer is "the wavelength of the color orange". Or at least that's what I read. So my question is: why orange? What's so special about orange? What as a species or as a solar system or as universe does the color orange have to do with anything? [[Special:Contributions/172.68.90.10|172.68.90.10]] 21:50, 16 November 2018 (UTC) SiliconWolf | Ok, I'm going to point out something. What's a meter? 1000 milimeters. What's a milimeter? .....skipping the questions all the way to the end, the answer is "the wavelength of the color orange". Or at least that's what I read. So my question is: why orange? What's so special about orange? What as a species or as a solar system or as universe does the color orange have to do with anything? [[Special:Contributions/172.68.90.10|172.68.90.10]] 21:50, 16 November 2018 (UTC) SiliconWolf | ||
− | |||
− | |||
: "The metre was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole." That's why orange. Think of those lines from equator to pole... and how an orange is divided in segments beneath the peel. This is why the "Terry's Chocolate Orange" is so called, because it resembles the fruit orange. [email protected] [[Special:Contributions/162.158.91.59|162.158.91.59]] 23:51, 16 November 2018 (UTC) | : "The metre was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole." That's why orange. Think of those lines from equator to pole... and how an orange is divided in segments beneath the peel. This is why the "Terry's Chocolate Orange" is so called, because it resembles the fruit orange. [email protected] [[Special:Contributions/162.158.91.59|162.158.91.59]] 23:51, 16 November 2018 (UTC) | ||
Line 106: | Line 98: | ||
There is already one link to a Veritasium video on this subject a few coments above, and there was a new video out just before this vote, about the new units: [https://www.youtube.com/watch?v=c_e1wITe_ig The kg is dead, long live the kg]. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 15:57, 19 November 2018 (UTC) | There is already one link to a Veritasium video on this subject a few coments above, and there was a new video out just before this vote, about the new units: [https://www.youtube.com/watch?v=c_e1wITe_ig The kg is dead, long live the kg]. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 15:57, 19 November 2018 (UTC) | ||
− | |||
− |