World's roundest object. 11:43 video:
Previously:
World's heaviest weight - video
Rounding a rock - GIF
Dough rounding machine - GIF
Bead rounding machine - GIF
World's roundest object. 11:43 video:
Previously:
World's heaviest weight - video
Rounding a rock - GIF
Dough rounding machine - GIF
Bead rounding machine - GIF
New plans added on 11/01: Click here for 2,541 plans for homemade tools.
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They have, or at least are in the process of doing just that. The kilogram will ultimately be defined in terms of Planck's constant, 6.626E-34 joule-sec. When that work is complete and the definition is incorporated into the SI system, all of the basic standards of the metric system will be defined, not in terms of objects in a museum somewhere, but in terms of unchanging universal elements.*
An excellent everyman's explanation of this work is here...
https://www.vox.com/science-and-heal...weight-science
Yes, the kilogram will be defined in terms of a quantum mechanical constant. And so the Luddites who think the inferial pound is better will have to brace themselves for the inevitable since the pound is defined in terms of the kilogram. (1 lb = 0.453592 kg).
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* If Planck's constant, the speed of light, etc. ever evidence change, it will be necessary to completely rewrite all of physics. Given the success we've had building stuff based on our assumption that they are invariant, that's unlikely to happen.
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Regards, Marv
Experience is always far worse than pessimism
It's all comparisons of one thing to another which is exactly what we have now, it will just be a different process by different people arriving at a different system of measurements no better or worse than what we have now, just different. What are we comparing and what are we comparing that to? Days or sols? And on which celestial body? Miles or kilometers? Cubits or rods? How Long is Chinese isn't he? Everything is relative to each individual and trying to "standardize" that or "universalize" it is folly. what are the odds that if you locked 10 brilliant minded individuals away without contact with one another they would come to the same basis let alone system for these measurements? So how far does light travel in one year? A year on what planet? Everything is relative.
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