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Milk has a specific gravity slightly higher than 1, so that isn't accurate.
Also, "cups" and "feet" aren't arbitrary. They aren't part of the metric system, but a cup is a standardized unit of volume and a foot is a standardized unit of length.
Exactly. How is a foot anymore arbitrary then a meter?
Or a cup anymore arbitrary then an ounce?
If you have to ask that you have no idea how metric works
Until a few years ago, a kilogram was defined by a block of metal.
From 1799 to 1960, the metre was defined by another block of metal. Before 1799, it was defined by a measurement that was hard to verify.
That kind of sounds arbitrary.
On March 30, 1791, the French Academy of Sciences defined the length of a meter. Before this date, there were two definitions to this measure of length: The first was based on the length of a pendulum and the second was based on a fraction of the length of a half-meridian, or line of longitude. The French Academy chose the meridian definition. This defined one meter as one ten-millionth of the distance from the Equator to the North Pole.
The meter is the basic unit of distance in the International System of Units (SI), the world’s standardized system of measurement. Since the 1960s, all countries have adopted or legally recognized the SI. As a universal standard of measure, the meter helped ease the exchange of commerce and scientific data.
However, the definition of a meter has changed since 1791. In 1983, the meter got its current definition. The meter is defined as the length of the path travelled by light in a vacuumduring a time interval of 1/299,792,458 of a second.
The meter was never to do with metal, and every metric definition is scientifically found, not based off of someone’s foot.
You are way overthinking this.
Also, a foot is just a scientific as any other definition as long as you use the same foot every time.
Can you get me All of the things that I would need to Measure the speed of light in a vacuum, then do the math to divide all that?
Because that is what the average layman would need to verify what a meter is.
That king is looooooong dead
And yet if we were to take something and make it the same length, We would have a rule about how long it was.
We could even call it something like a ruler, or whatever the metric equivalent of a yardstick is, a meter stick maybe.
And than what happens when it’s destroyed? You don’t have anything to verify it with, and using a rulered rule to rule will lead to progressively larger deviations from the true original.
This isn't any different from metric systems. If all meter sticks are destroyed, then what do you do? Build everything up again to be able to measure the distance travelled by light in a vacuum in 1/299,792,458 seconds. The procedure would be exactly the same for feet, except you measure the distance travelled in 0.3048/299,792,458 seconds.
I don’t disagree with you really, I just think you’re overthinking it.
It just doesn’t matter in 99.99% of cases and for the ones that it does we have metric.
Do I wish more things in life were metric?
Fuck yes I do, I hate fractions so much, like not normally but when it comes time to have to do a conversion…
A fraction of the Earth's diameter isn't a sound scientific reasoning to define a length. And after that, the definition reverted back to a similar definition of a foot, a fixed length of an item, similar to a foot.
The two main benefits of the metric system are the decimalized behavior of its units and that the scientific community adopted it early, creating additional units from the standard and allowing for greater precision of the initially defined units over time.
However, the value in the meter being its length is the same as everyone agreeing the Prime Meridian goes through Greenwich, UK; it is because everyone agrees to it.
Imperial measurements were based on arbitrary things, metric has specific scientific definitions for their weights.
1l of water is 1kg at sea level, why the fuck is kings foot size the defacto foot?
What do you mean? A pound is legally defined as 0.45359237 kilograms.
And the kilogram is defined:
These are all currently defined off of the same universal constants, just with different multipliers, which are all arbitrary numbers: 6.62607015 is just about as arbitrary as 0.45359237. Hell, the number 10 is arbitrary, too, so we still use a system for time based on dividing the Earth's day into 24 and 60.
Like, I get that there's some elegance in the historical water-based definitions derived from the arbitrary definition of length, but the definition of "meter" started from about as arbitrary a definition as "foot" (and the meter was generally more difficult to derive in the time of its adoption based on the Earth's dimensions).
I’ll nitpick that said definition is also arbitrary. Why is it 1l of water at sea level, and not molecular weight of the water? And why a Liter anyway.
Even metric units like time are somewhat arbitrary. Why is a second based on caesium frequency, and not some other element?
Why? Because 1L is 1000 Cubic centimeters, which takes 1000 calories to raise 100 degrees to boiling point.
Nothing is arbitrary with metric, everything is also directly related to every other measurement.
Because 1 Drakon is 1000 Cubic 100tholians, which takes 1000 Vornies to raise 100 degrees on the Flugar scale to boiling point.
Metric is very scientific, but it was made through arbitrary means. They chose to make it easier than imperial by using divisions of 10. But it's all based on a single measurement that they made up through arbitrary means.
"We have this length called a meter. How do we define it? Let's use it to measue something in nature and then use that measurement to define it."
In this context milk is a bad example because the difference between 1.03g/ml and 1g/ml is negligible in a kitchen. Even oil (0.92g/ml) is close enough.
This matters the most for stuff like below (with 1cup = 240ml):
All units are arbitrary, be them metric or esoteric.
The context is that if you are going to hand wave away a 3% difference in a quantity, then having to weigh everything probably isn't important.
That's poor reasoning; ignoring a tiny difference doesn't imply ignoring larger ones. Myself mentioned three cases where the difference matters, with one (flour) being highly variable.
A better argument to defend your point would be that most differences in the kitchen are tiny.
I've been making that argument in other comments. If I had to argue the nuances of this argument in every comment, I'd be copying and pasting pages long comments that no one would read.
It's close enough for home cooking, the specific gravity of milk is around 1030g/L so unless your recipe calls for multiple liters of Milk the small difference isn't going to affect the result.
And now you are getting to the reason why American use volume for recipes. If I don't need the precision of mass for recipes as it won't appreciably affect the taste, then why break out the scale?
Because the difference between packing a cup of flour and not packing a cup of flour is as much as 30%
https://www.loveandoliveoil.com/2020/01/weight-vs-volume-measurements-in-baking-and-the-best-way-to-measure-flour.html#:~:text=So%20depending%20on%20how%20you,of%20150%20grams%20(!!)
It doesn't really matter for liquids, but dry ingredients are a whole other ballgame when it comes to this mess.
It’s really mainly only flour though, because can be compacted, most of the things that you’re using in the kitchen like baking powder or sugar aren’t going to be compacted to any appreciable level.
For flour, you pour it into your measuring cup and then run the spine of a knife or something over it to get rid of the excess flour and get a level cup
There are many of other things that can be compacted or have different volume to weight ratios.
Corn starch is like flour, you can pack it down.
Salt (Table vs Kosher) Kosher salt has about half the volume to weight as table salt.
Shredded Cheese (this one always bugs me. Is it 3 cups after shredding, or before... how packed in should it be), etc.
Also, the proper amount of shredded cheese is the container.
A lot of volumetric baking recipes tell you to run the grain through a sieve to remove clumps, this generally standardizes the density well enough.
Salt is usually assumed to be table salt unless noted in the recipe. Even then, most recipes have a point to them where they tell you to taste the food and add salt to taste as necessary.
What are you cooking with shredded cheese where the ratio is that important?
Are you measuring cornstarch?
Maybe I just have weird cornstarch but anytime I try to actively scoop out of it, it’s like trying to scoop baking powder.
I use it frequently in coatings for Japanese deep fried foods, usually mixed with flour and salt in particular ratios.
I usually just eyeball stuff like that
In my other responses, I've noted that I don't bake. In other people's responses, they've noted that there are still a lot of baking recipes out there that don't require precision.
Precision in baking is massively overstated. The earliest recipes are in parts if you're lucky. More likely they are mix in these ingredients until it looks right.
Elevation changes everything though and if you don’t adjust the measurements change more.
If you’re at sea level, sure.