Anonymous at Sun, 26 May 2024 23:03:29 UTC No. 16194911

Groups of amounts which can be related

Anonymous at Sun, 26 May 2024 23:18:18 UTC No. 16194937

Units are constants. 2m + 3m = 5m. What the fuck is an m? Who cares, there's 5 of them.

Anonymous at Sun, 26 May 2024 23:37:11 UTC No. 16194970

>>16194896
To distinguish between different measurable quantities.

Your friend walks up to you and says "give me twenty". Does he want twenty dollars? Twenty kilograms of uranium? Twenty minutes of your time?

Anonymous at Sun, 26 May 2024 23:53:13 UTC No. 16195000

>>16194970
That is a slang for fentanyl overdose where fake twenty dollars were involved.

Anonymous at Mon, 27 May 2024 01:05:49 UTC No. 16195067

>>16194911
If different things need to be related, does that imply distinct things really exist?

Anonymous at Mon, 27 May 2024 09:07:16 UTC No. 16195494

>>16194896
units don't exist, one day we will find that given the right choice of constants everything will be measurable with the same unit

Anonymous at Mon, 27 May 2024 09:37:29 UTC No. 16195518

>>16195494
>units don't exist,
Yet your penis is exactly two centimeters long...
>we will find that given the right choice of constants everything will be measurable with the same unit
Well no. That doesn't work out at all which is why it isn't done even though it could be done.

Anonymous at Mon, 27 May 2024 09:39:04 UTC No. 16195521

>>16194896
>What the fuck are units? Why do we need them to make measurements? Do they bridge the gap between the abstract and the concrete? They're arbitrary too but somehow still work. Wtf why?
Have you ever used a type system in a programming language? Units are a little bit like that. Arguably, they're exactly like that if you formulate an appropriate type system. The consistency of the types is a sanity check. Dimensional analysis is basically making use of the Curry-Howard correspondence to show how your calculations satisfy a theorem about units.

Anonymous at Mon, 27 May 2024 09:54:10 UTC No. 16195539

>>16195067
According to SI there are 7 distinct things from which all other measurements are derived.

Anonymous at Mon, 27 May 2024 16:40:55 UTC No. 16196092

>>16194896
it just werks

Anonymous at Mon, 27 May 2024 18:22:47 UTC No. 16196229

>>16196092
This is retarded
Just use kiloseconds if you really want a 10^n time unit

Anonymous at Mon, 27 May 2024 18:27:02 UTC No. 16196237

>>16196229
That sounds good in theory but I read a novel once where all times were expressed as power-of-10 multiples of a second and it was fucking incomprehensible.

Anonymous at Mon, 27 May 2024 18:30:08 UTC No. 16196242

>>16195539
yes, although depending on who you ask, some think the fundamental dimensions should be different.

i've heard some pretty convincing arguments that 'mass' should be replaced with 'force', for example.

Anonymous at Mon, 27 May 2024 18:35:52 UTC No. 16196256

>>16194896
They're literally just useful ways of grouping quantities, that's all

Anonymous at Mon, 27 May 2024 18:39:24 UTC No. 16196263

>>16196242
>i've heard some pretty convincing arguments that 'mass' should be replaced with 'force', for example.
But mass is already a component of force

Anonymous at Mon, 27 May 2024 19:15:29 UTC No. 16196304

>>16195539
>7 distinct things
How does spacetime factor into this?

Anonymous at Mon, 27 May 2024 19:24:52 UTC No. 16196315

>>16196263
NTA but If you decide force (N) is the standard unit, all that changes is Force is then described a component of mass and the kg is redefined as a N•s^2/m. I don't think this has any real effect on physics. And while I don't know the arguments for why some think SI should be defined using force over mass, I will say all things with mass are able to exert force between objects (to my knowledge), but mass is not a requirement for something to exert a force (photons), so I don't think it's far fetched to believe the Newton is a more accurate basis.

Anonymous at Mon, 27 May 2024 19:45:06 UTC No. 16196330

>>16196263
Or force is a component of mass, if you look at it the other way. From the experimentalist point of view - force is the meaningful measurable quantity, and mass is the derived quantity (even though the theorist would argue mass is the more intrinsic property).

Anonymous at Mon, 27 May 2024 20:03:30 UTC No. 16196351

>>16196330
Well mass is just apparent force applied over some area, no?

Anonymous at Mon, 27 May 2024 20:10:35 UTC No. 16196368

>>16194937
>>16194937
Units can convey relative as well as absolute quantity. Fractions, angles, etc.

Anonymous at Tue, 28 May 2024 06:07:41 UTC No. 16197168

>>16194896
Units let you quantify both concrete and more abstract things. If I said that my speed is 5, you naturally ask "5 what?". If I said that there's 9 in the electrical system, you would ask "9 what"

Anonymous at Tue, 28 May 2024 08:47:44 UTC No. 16197407

>>16196351
No

Anonymous at Tue, 28 May 2024 08:52:09 UTC No. 16197412

>>16194937
A meter is defined as 1/10,000,000 the distance between the north pole and the equator. If you want to define it using a universal constant it would be 1/299,792,458 the distance light travels in a vacuum every second. If I say the distance from where I am to new york is 5, I'm not conveying anything. Five what? km?, M? mm? Mpc? I haven't defined anything with a base unit, if instead I say I'm 5km and thus 5 (1/10,000 the distance from the north pole to equator) away from new york, where (1/10,000 the distance from the north pole to equator) = 1km I have actually defined an empirical measurement.

>>16194896
>Do they bridge the gap between the abstract and the concrete?

Not really. Dimensional analysis usually works not by looking at the units necessarily, but what the units convey. Meters convey distance, seconds convey time, joules convey energy, ect. The usefulness lies in how we manipulate the "dimensions" of the physical system.

Anonymous at Tue, 28 May 2024 08:58:04 UTC No. 16197417

>>16194896
They are noticeable changes in the perception of an event, like one sheep then two sheeps, it can be way more arbitrary than that like a fraction of an average speed, those are mostly useless

Anonymous at Tue, 28 May 2024 16:11:47 UTC No. 16197827

>>16196304
Why would a mathematical model factor into units of measurements?

DoctorGreen !DRgReeNusk at Tue, 28 May 2024 16:36:01 UTC No. 16197858

>>16194896
>the abstract and the concrete
they both are buzzwords

Anonymous at Tue, 28 May 2024 16:40:51 UTC No. 16197864

>>16197168
>If I said that there's 9 in the electrical system, you would ask "9 what"
heh