Post AEU9hfAFBXV1T546dc by changeling@disqordia.space
 (DIR) More posts by changeling@disqordia.space
 (DIR) Post #AETvidloSGg04lD3zc by alexandra@mk.nixnet.social
       2021-12-17T02:33:17.561Z
       
       0 likes, 0 repeats
       
       It is nice that if you ever need to very quickly roughly define a kilogram you can just get a liter of really cold water and it'll be pretty closeAnd if you need to define a liter you can just use three metersticks and mark off 10cm in each directionYou do need a meterstick though and it's kind of hard to make one from scratch (laser and very precise clock is possible but not for an ordinary person)
       
 (DIR) Post #AETvieCOrPwZPDeIQy by alexandra@mk.nixnet.social
       2021-12-17T02:34:17.953Z
       
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       But like if you have a 1kg weight you can work out how much cold water that is, find the edge length of that cube, and multiply by ten and now you've got a meter
       
 (DIR) Post #AETvieYNXhWaVNvqgy by carcinopithecus@x0r.be
       2021-12-17T02:45:43Z
       
       0 likes, 0 repeats
       
       @alexandra just gotta figure out how to get that water to form a cube...
       
 (DIR) Post #AETvieyxwqn9pqN58K by urusan@fosstodon.org
       2021-12-17T03:05:29Z
       
       0 likes, 0 repeats
       
       @carcinopithecus @alexandra Step 1: Buy an aquarium
       
 (DIR) Post #AETxbZUo9EtghV0r2W by changeling@disqordia.space
       2021-12-17T03:15:23.053125Z
       
       0 likes, 0 repeats
       
       @alexandra 🦋 simply measure the distance traveled by light in 1/299792458 second: meter stick
       
 (DIR) Post #AETxbZxWQTrk8YRmnQ by alexandra@mk.nixnet.social
       2021-12-17T03:17:32.613Z
       
       1 likes, 0 repeats
       
       @changeling@disqordia.space yes but as stated, actually doing this requires tools and techniques that are not readily available to an ordinary person, and especially not in an environment where you might need to rapidly rederive your measurement system
       
 (DIR) Post #AETxdK3yUvCPPqISqe by abloo@fedi.absturztau.be
       2021-12-17T03:26:56.043207Z
       
       0 likes, 0 repeats
       
       @changeling @alexandra what medium is the light in?
       
 (DIR) Post #AETxja2I1YOUgyUb5c by alexandra@mk.nixnet.social
       2021-12-17T03:27:12.708Z
       
       0 likes, 0 repeats
       
       @abloo@fedi.absturztau.be @changeling@disqordia.space vacuum
       
 (DIR) Post #AETxjaW4EqDIBKQNVI by alexandra@mk.nixnet.social
       2021-12-17T03:27:47.314Z
       
       0 likes, 1 repeats
       
       @abloo@fedi.absturztau.be @changeling@disqordia.space but if we're deriving units roughly we probably don't have a very good vacuum pump
       
 (DIR) Post #AEU9hfAFBXV1T546dc by changeling@disqordia.space
       2021-12-17T03:30:14.061482Z
       
       0 likes, 0 repeats
       
       @alexandra @abloo 🦋 how much would Earth's atmosphere really slow it down at the distance of just one meter? probably no more than the variance of the water's volume from not being precisely 0
       
 (DIR) Post #AEU9hfYhib46gwVdlQ by alexandra@mk.nixnet.social
       2021-12-17T03:31:24.838Z
       
       0 likes, 0 repeats
       
       @changeling@disqordia.space @abloo@fedi.absturztau.be exactly; rough derivations are rough, they're gonna be a bit off but that's OK
       
 (DIR) Post #AEU9hfxsD1CLx0Hjzk by changeling@disqordia.space
       2021-12-17T03:32:57.204651Z
       
       0 likes, 1 repeats
       
       @alexandra @abloo 🦋 presumably we are in some kind of survival scenario not trying to do an orbital maneuver