The kg is dead, long live the kg 

Game of life update: Minor bug fixes

But steel is heavier than feethers

Meanwhile the US: "this screen is 3 sticks wide and weighs 5 stones. "

Meanwhile at a civil engineer's paper: "Yeah, pi is totally 3..."

2018 Patch Notes - Slightly adjusted the plank constant. This is a QOL change for a small number of people doing the Science profession. It should have no effect on most players.

Damn. I thought I’d be able to finally say I’ve lost weight.

Meter - Speed of light Second - Hyperfine transition frequency of cesium Kilogram - Planck constant Ampere - Charge of an electron Kelvin - Boltzmann constant Mole - Avogadro's number

"no longer tied to physical objects" Ironic that this should be the result of nearly two centuries of material science.

fundamental constants in nature > physical artifacts

It is funny because the definition of a pound is based on a decimal number of the kilogram, so the pound will be changing in turn as well

Me: So, does this change anything? Veritasium: Well yes, but actually, no

I would like to see two teams, working independently with these new definitions, each create a 1kg mass. Then bring the 2 masses together on a balance and see just how close they are!

The world: we redefined Kg USA: what’s Kg..?

I knew I gained a little weight. Thanks for letting me know it's not my fault.

Seems odd this was recommended to me now considering the thumbnail and the current royal circumstances

I had strayed away from real physics for 3-4 years now. Today I picked up my old physics textbook and started to read from the very first page. Getting to "units" reminded me of how Kilogram was going to change as I had heard a couple years back. This video cleared that up and so much more. I had always loved science, especially physics. But I could never put it in words the way Derek did here. These things we're doing are truly the pinnacle of humanity.

This is like releasing a new update to a game, with some bug fixes.

Textbook publishers are salivating at the opportunity to change just a couple digits because of this new standard and calling that a new version they can charge a couple hundred bucks on.

I really enjoyed the part where you talked about the importance of making precise observations and our scientific achievements as a species, cos I totally agree with you. Thanks for making this video.

i love your excitement in science! it matches with mine and i get happy everytime i watch one of your videos! thank you! :)

8:10 "No longer tied to physical objects" Veritasium uploads his consciousness to the internet.

But steel is heavier than feathers :/

I had *weighted* so long for this moment!!

This Channel is so awesome! Your vídeos should be mandatory on every school on Earth!

Sigh, All thees fixed constants with a huge string of "random" numbers after the decimal. Why cant we make them nice round numbers again?

"Measure what is measurable, and make measurable what is not so" -Galileo Galilei

Woow ! Very eloquent episode ! Thank you Mr Veritasium !

I saw it in 2019: didn't understand it. Seeing it now I really understand the concept...

And here I am still using 10 m/s2 for gravitational acceleration rather than 9.81 m/s2

Finally those constants are constant

I would think this might shake things up in the fabrication of microprocessors, might it not? If someone has a 9 nanometre process and two different fabrication plants have different ideas of "volt", that could be a real issue.

Nice to see you in West Van.!

*PLEASE NOT WHILE I'M TAKING COLLEGE CHEMISTRY*

And now what happens to Big K and all the other standard kilograms? Do they get sold on eBay or what?

So prince philip dies and i get this jn the recommends

Finally, a very good video from you :)

So this update patch some bugs? nerf? buff?

We're no longer tied to physical objects... of spacetime. Wait, no, wrong channel, sorry.

best birthday gift ever, which i didnt even know about until 3 years later

I don’t know why I watch these videos because I learn absolutely nothing from them, yet I still find them so interesting

Scientist: **dies** Other scientists: E=hf

I'm studying electronics engineering and I had a lecture today (for the course of "Basics of Measurements and Metrology") about the standarts of measurment, and the prof showed us a pair of Veritasium videos about the kilogram, and we talked about there very same things as Derek talks in his video. It just feels so cool for me that the these things matched at the same day :)

I was waiting for this to happen 6 years ago And I'm just now getting this in my recommended.

I think redefining these things is great too, because it undermines the shift in science from directly observable classical physics to abstract modern physics based on mathematics and theoretical parts of physics rather than direct observation. In this way, the constants that replace the directly observable physical objects that define these units are mainly based on mathematics in the form of the equations given by theoretical physics.

look at how he aged so fast just look at it

100 years from now, this'll be on the "History" slide in a high school powerpoint and the teacher'll say "you really don't need to know this, I just have to teach it to you."

Lbs.: "Were you killed?" Kg: "Sadly yes ... . . . BUT I LIVED!"

Great content. Keep up the good work.

If this is passed, and Texas Instruments doesn't add a button with an avocado on it that is equal to exactly 6.02214076 x 10^23, I'll cry

NNN Day 1 : um this is not hard NNN Day 3 : THIS IS IMPOSSIBLE !!!! NNN Day 10 : can somebody kill me NNN Day 15 : thinkin : *(what if we use Plank's constant to define mass instead of use mass to define Plank's constant)*

Really like what you said about science and measurement. MEasuring gravity waves stands head and shoulders above stacking one 2 ton block on top of another. Thanks. By the way, how does one level an object when there is no gravity? I am talking about a bubble level. I guess it is done with lasers. Any thoughts?

one of the best video titles ever

Avicii, Stefan K. Stefanson, Stephen Hawking, Stan Lee, And now the Kilogram ...thanks 2018 Expanding the list:(XXXtentacion, Stephen Hillinberg, George Bush...)

Big K sounds like a drug

This is a truly brilliant and beautiful solution

4:54 taking a screenshot of this, just in case civilization collapsed and i need to raise a new one

This is MASSive news I'll see myself out

I'm glad Plankton is finally getting some recognition after years of going after that secret formula.

One of the funny things that happen by changing the definitions this way is that now we don't have a mathematically elegant way to answer a student's question: "why?" Because when a student asks why planck's constant is 6.62607e-34, we could answer by saying that it is a constant that we found by measuring the ratio between m and f/c^2. But after this change, we can no longer do that. The answer to the question "why" essentially becomes "It just is" because now, we didn't "find" the number but "defined" the number. It's a new funny minor problem that comes from defining the constants.

Derek - "You set Plank's constant to have a fixed, exact value. Now, I know that sounds a little strange, so bear with me for a moment." Me - ".....I like tater tots...."

Does this mean Pluto is a planet now?

That's a Queen's engineering jacket!

Some things that used to be empirically measured are now exact constants, and, on the flip side, some things that used to be defined constants are now empirical values. The freakiest consequence of this, to me, is what happened to the magnetic permeability of vacuum. It used to be defined as exactly 4pi * 10^-7 H/m. It had exactly the digits of 4*pi. Now... it's *almost* that, but there's experimental uncertainty!

They should make 2 exact 1kg objects and one exact weighing machine with both a display and analog pointer to show the mass in kilograms so they can determine even 10 years in the future if a) both 1kg objects stayed the same, and b) the weighing machine is as precise as it was 10 years ago. If you have 3 things together, which all should show exactly the same (of course on the same temperature), it would be the perfect setting. One more thing: You either just have to find an exact measurement of the "room temperature" as well, or you have to make sure, that the measuring method is uneffected by different temperatures. I don't know yet if diffenrent temperatures play a significant role on the mass of objects, but I think on a really small scale, they do. What do you think? If you want to change the world (on weighing) the same, you just have to invent a new standard and update all weighs which will be built in the future on that standard. Like for example a special sticker. So you know every time, whether a weigh is precice or has a bit of uncertainty built in. Revolutionize the world.

Derek is so humble ,he made a video go 9:57 but not stretch it 10:01

Does that means a kilogram of steel is heavier than a kilogram of feathers?

This guy literally made me fall in love with science all over again

This went over my head but was still super interesting to watch, duh This is Veritasium, after all :)

It's the red wedding for units

I get it, for the first time in history, all our measurements of what things are, are no longer linked to anything physical in our world but a mathematical principle. We can now measure things more accurately than we can make things to that measurement.

When youtube recommends this video after I watch a video about Prince Phillip's death RU-vid: "There are no accidents"

coming back to this, years later...i genuinely cannot believe this wasn't big news

8:16 *_Hey! Vsauce, Michael Here_*

Does this mean that I lose weight? ;-)

QOL change for the Electrican/Mechanic/Engineer/Scientist professions.

Question: Will the silicon ball (Le Big Silicon Ball) change in measured dimension or weight over 50, 100, 150 years? If so, will these first principle and determined constants.

if only they met in versailles on 11th november...

But steel is hevia than feathas

Logician here. This feels like a great startingpoint to discuss the interplay between formal systems and semantics...

God bless Derek.... great work.

I lost weight while watching this video.

Most Americans :" cool, but what's that in lbs?"

"The conquest of nature is to be achieved through measures and numbers." -Descartes

Brilliant closing speech about importance of Science

I'd really love to see a video on ground-up definitions of all units from the basics. Mass of a proton, charge of an electron, etc, and see what the human-scale metric system would look like built that way. I'm sure there are people out there who have proposed such systems.

Does this explain why my gram of dope is always 0.9....

Someone really held that piece of metal and was like "yup, that's a kilogram"

How tf did I read it "king" and the next moment I saw the "i" and "n" was missing and the word's just "kg", it felt like some Mandela effect sh*t

First Stan Lee, now kg Smh

Me at a French Restaurant: I would like Le Grand K

The Korean subscription is incorrectly translated. Thier masses are Diverging -> 분산 xx 각기 다른 질량이 벌어지고 있습니다.

Mass and weight are two different things. Mass is a constant and weight is not. Weight is dependent upon gravity. And gravity on earth is always slightly changing.

Thanks a lot for this and all other videos of yours. Your science facts become so uniquely meaningful by your philosophical reflections, it's so great.

I really am a huge fan of a standard system for units. (SI) But what outrages me is that ampere is the base unit for electricity. Charge per time is not fundamental, but charge is. So, long live Coulomb!

Would really appreciate details on how those other measurements are being redefined, especially temperature.

You know he’s serious when he has his hand like he’s about to summon a fireball

Am i the only one who thought the title will be "The kg is dead, long live the pound" That would've been horrible

Derek looks 25 but his hair says otherwise

Fascinating. I really like the his episode.

America: “mass is mass!”