The kg is dead, long live the kg

The kilogram, mole, kelvin, and ampere will be redefined by physical constants. For a limited time, get 3 months of Audible for just $6.95 a month: audible.com/VERITASIUM or text VERITASIUM to 500500
Will this be the last video I make about SI units? Quite possibly. There's something about being so precise and defining the systems within which science works. When we can more accurately and routinely measure a kilogram, a mole, a kelvin and an ampere, then we can make better observations, we can better detect anomalies and improve our theories. That is why this is so important to me.
Special thanks to Patreon supporters:
Donal Botkin, Michael Krugman, Ron Neal, Nathan Hansen, James M Nicholson, Terrance Shepherd, Stan Presolski
Special thanks to NIST: nist.gov
Additional graphics by Ignat Berbeci
Music from epidemicsound.com "Experimental1"

[@Rundik]

Game of life update: Minor bug fixes

[@franzferdinand2240]

😂😂😂😂😂

[@OrangeC7]

Patch notes: "...The Kilogram was very inconsistent so to fix that we made it a constant instead of a variable based on physical phenomena..."

[@rashidabano2373]

I also heard that in v4.8 they might add new measurements

[@the_original_Bilb_Ono]

we are eventually going to mend with machine. We will be the simulation. A higher consciousness.

[@Kaziedell]

Patch notes: [ Kilogram removed ] too confusing for new players, replaced with exact value

[@irokosalei5133]

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

[@AdenUnavailable]

Such an underrated comment

[@LeglessWonder]

The UK is who uses “stone” as a weight tho…

[@JustBackgroundNoise]

Those wouldn't be any more or less arbitrary than the meter or kilogram, honestly.

[@zylnexxd842]

@@LeglessWonder no

[@LeglessWonder]

@@zylnexxd842 yes

[@RubenALopes]

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

[@tiskbubbles4688]

2 = e = pi = 3, the fundamental theorem of engineering.

[@montikore]

@@tiskbubbles4688 I'm late to this but that rolls off the tongue so easily that now I'm curious. What's it mean, please ELI5

[@justkidding7264]

@@montikore don't wanna know, im not an engineer. Life is short, leaving all questions to science and technology or whatever.

[@MasterAdamonia]

Or 5, sometimes it really doesn't matter.

[@deez_nuts_77]

@@montikore e is a constant having to do with exponential growth, about 2.7

[@dexter2392]

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

[@Gigachad-mc5qz]

Avocado number? 🥑

[@samename3184]

But steel is heavier than feethers

[@michal31131]

They're both a kilogram

[@18jiggaboo]

No its not

[@18jiggaboo]

@1kparmar my pp is heavier than yours.

[@rowtow124]

@1kparmar I'm pretty sure that the spelling here is just a joke about the Scottish accent. Though "bu steels heaviar thin feethers" would fit better

[@rzomg]

let me hit you with a kilo of steel in your face and you hit me with a 1kg bag of feathers. Deal?

[@Kaskobi]

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

[@ooXxDrUmMeRxXoo]

Underrated comment right there lol

[@Akshay-]

OMG it's kaskobi btw I am a huge fan of your covers

[@jimdecamp7204]

Maybe you can say that you've lost mass.

[@fliikfpv1862]

Technically you would lose mass

[@adhilmuhammed2754]

clearly your career isn't in physics... i luv ur vids

[@Morbpious]

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

[@mauz791]

Very nice

[@catch2297]

F

[@rezandrarizkyirianto-1933]

m.a

[@robertowisconetti2732]

i cant understood the joke

[@martonlipovszky6617]

Ehf

[@lrimunlmorin7947]

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

[@tippyc2]

That's not irony. The various physical standards were created to standardize commerce, not as scientific instruments. A couple centuries later, scientists improved that by defining them in a way that's even more standardized. And the physical standards may be a couple centuries old, but the science leading to this is much older.

[@JackBlackNinja]

@@tippyc2 his comment was a truly fantastic example of irony. But I understand where you are coming from. And if we are being nit-picky... "no longer tied to physical objects" is not a true statement taken seriously, but everyone can intuit what is meant by it. To imagine a physical difference between physical objects and non-physical objects is to misunderstand what 'physical' means and what a 'non-physical' object really is. But I still understand what people mean when they say non-physical, even if it must be true that everything exists extended in space-time. Of course people do well and truly believe in non-physical objects like knowledge, spirit, mind, god, emotions, etc. While I understand the sentiment, to believe they are actually non-physical is a misunderstanding of physics

[@connarcomstock161]

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.

[@slonkazoid]

r/foundtheprogrammer

[@somaannn]

@@slonkazoid r/ihavereddit

[@slonkazoid]

@@somaannn so do i

[@somaannn]

@@slonkazoid You dont get it do you

[@Supernoxus]

@@somaannn Hilarious

[@thejesuschrist]

fundamental constants in nature > physical artifacts

[@Eletronicafg]

WHY ARE YOU COMMENTING ON ALL VIDEOS I'M WATCHING??? have a nice day.

[@Irrelevant98]

@@Eletronicafg Jesus is omnipresent Duh

[@ablone]

Jesus I love your channel. Thanks for helping the 9 year old army.

[@Draxis32]

Guess you didn't heard it correctly Lord and Savior. The constants actually change.

[@SuperBasedownlow]

I see you everywhere on youtube

[@gedstrom]

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!

[@OriginalPuro]

Both teams would just go to the store and purchase a digital weight.

[@OllieWales]

@@OriginalPuro you reckon a team of scientists would do that?

[@jonathangruber7793]

@@OllieWales Lol right? 😆 Scientist: "Put like a tiny little piece of this nug on the pile EASILY. That should hopefully make it exactly 1kg!"

[@yaboi7034]

@@OllieWales Yea probably

[@theman13532]

@@OriginalPuro if i hadnt known about a certain game my reaction to your username would have drastically *changed* from pure fear to nothing💀

[@Vexy93]

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

[@justkidding7264]

Make it more complicated. And maybe some special trick in it are military weapons. 🤣🤣🤣, Some people like to control those fundamental unit. Very American. To me.

[@jeanf6295]

Fundamental dimensional constants are now constants, and all the physical reference weights are now drifting. The old way was to take one arbitrary reference weight, and update everything according to the way it drifted, including Fundamental dimensional constants. That was kinda insane, though with a drift of the order of one part per 10 million in one century, that did not affect many people.

[@KLScience]

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

[@badlandskid]

KL Science USA: Why bother? It will just change.

[@mbsgamerpro]

Ha. The US can’t change anything

[@bdragonseven]

@@mbsgamerpro that... Doesn't even make sense. Flat out ignorance.

[@hagotem3071]

We still learn the metric system, we just don't use it as a everyday reference.

[@Zkchary]

US pound is based off kg

[@VictorDomonik]

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

[@ankush.b.makhija7878]

😂

[@tonynova]

@Leonardo drum roll No, 42

[@_xxxx_1089]

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

[@kavuljakmichal]

Lol same

[@AJD...]

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.

[@funkyman909]

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

[@brookspact6069]

No avoirdupois weight isn’t based on Kg, it’s been used since Rome (although it was something else) they do coincide in the fact that they both measure weight kind of. Kg measures mass which is independent of gravity and pounds measure with the inclusion of gravity. A good way to put it is metric is for maths imperial is for how it feels to humans (Edit: This does mean that in comparison to the new vs old kg the pound changes but not individually, one pound of steel remains one pound of steel while retaining its volume)

[@RickTrajan]

Yes but actually, no. Units are just converted over - in that way the definition of pound is changed. How pound was defined back in the day would not change - though how things are defined before, now and after which one would matter? And for what you are doing, does it matter to use extreme precision?

[@jamesdinius7769]

@@brookspact6069 This actually gets confusing. Their are actually two different pound units in the imperial system. The pound force (a derived unit for weight) and the pound mass (a base unit for mass). One pound mass is the amount of mass that exerts one pound force under Earth gravity. This is a confusing point (as if this system isn't dumb enough) that I didn't understand until I went to college (I am studying engineering, and therefore have to deal with both unit systems) This pound (mass) is as of now officially defined as 0.453592 kg. It once had an independent mass standard equivalent to big K, but this was discarded. This also means that the imperial system has two different mass units, the pound mass, and the more truly base but rarely used unit: the slug (14.5939 kg).

[@quacktheduck3652]

RickTrajan *Well yes but actually no

[@PaulusCunctator]

@@RickTrajan No one uses how things were defined before, and even then, how they were defined before was inaccurate and varied significantly, they just weren't doing anything sensitive enough that it would significantly matter. Though pounds are still not used by anyone doing work that precise, but anyone currently using pounds as their measurement just got updated since it's CURRENTLY based on the kilogram.

[@quickknowledge4873]

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.

[@kconger_]

A new digit added to a constant for publishing companies and authors is what the bell is to Pavlov's corpulent dogs.

[@WilliamFord972]

Just buy older versions on Amazon, because (a.) the amount by which the numbers will change is negligible for most purposes, especially textbook purposes, and (b.) even after the change, one can just look them up on Wikipedia lol

[@nathandaniel5451]

I'm not complaining! That means the almost identical older copy is probably going to go down in price!

[@thomasrad5202]

I was just thinking the same thing

[@w0ttheh3ll]

As far as Planck's constant, the elementary charge and the Mole are concerned, this is the last time EVER that they can do it.

[@beactivebehappy9894]

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

[@bait5257]

Reeeee

[@momosvge8538]

Weeeeee

[@Azmythometre]

Beeeeeee

[@DoubleAAce]

Ceeeeee

[@jasonl881]

Not funny

[@muhaimin244]

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.

[@villelepoaho4105]

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

[@abhishekgourav6144]

But for normal people it would seem like the bug never got fixed...

[@GRosa]

@@abhishekgourav6144 'Normal' people wouldn't even know that there was a bug 🐞

[@fofkifkj497]

By rigging the game with shaky, human perceived notions to redefine human perceived notions so as to raise the notion that it is better than the last notion? No thanks.

[@jimdecamp7204]

It's really more of a game-changer. It's rewriting the rules. If you read up on the details of making the measurement, it's incredibly difficult. It's only because NIST (following the example of Kibble at Britians's NPL) has acquired the capability to make the measurement that redefinition is practical. Redefining the kg in terms of Planck's constant and not having anyway of accurately relating Planck's constant to mass would not make sense. Now that we can reliably measure the *effects* of Planck's constant more accurately than we can measure mass, the change was inevitable.

[@Blipblorpus]

Still gotta update and fix earths physics engine. It's ok but they haven't united quantum mechanics and relativity. It's ruining the game 😪

[@Gintokikreuz1]

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

[@AwareOCE]

And is still running consciousness.exe on physical servers

[@Thanos-hp1mw]

Good point. I've never seen him in real life as well

[@aurelienyonrac]

Economy: no longer tied to gold

[@tjejojyj]

It’s really “no longer tied A physical object”. The video clearly shows the historical development and refinement of these came out physical experiments. We will find eventually find out if there are problems with the new framework. It took 220 years for the last one the develop sufficient problems to require its replacement. Maybe it won’t take as long this time.

[@nuibui6667]

Uploading videos on the internet is basically doing the work your amygdylla does. Slowly but surely consciousness will also be shared.

[@kalliopi4301]

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

[@luiggiphilipi]

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

[@sebi20032011]

But steel is heavier than feathers :/

[@MifuneTakumi45]

But look they're both a killogramme

[@captainprice4261]

@Harold Potsdamer r/ whoooosh

[@d3monix444]

@@captainprice4261 Ah, yes thanks for being an ass instead of explaining that it is from a video, really helpful for you to like a subreddit about people being annoying and rude.

[@sudarshanlahoti3856]

*denser

[@ShorkDork]

@@d3monix444 bigger r/wooooosh

[@ihaveseverefrootsnackism]

*PLEASE NOT WHILE I'M TAKING COLLEGE CHEMISTRY*

[@theanimalkeaper]

Sammeeee 😂😭😭

[@mihir2607]

SAME HERE SILENTLY OPENS THE VIAL OF H2S IN LAB

[@MrLuigiBean1]

*CHUGS H202*

[@Highstinee]

Hahahahahahah good luck

[@daanwilmer]

Don't worry, two mole of hydrogen and one mole of oxygen will still make two mole of water - even though the number of molecules in a mole has been redefined by an imperceptible amount.

[@dayashankarsuresh57]

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

[@xdxe8606]

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

[@Kim_Witt]

Boy oh boy how right you are

[@sannidhyabalkote9536]

@@Kim_Witt lol

[@shenghan9385]

Lmao. Learn how to start a fire will be more essential.

[@bait5257]

@@shenghan9385 😂😂😂

[@leonsantero9903]

Rise of Kingdoms Play Now!

[@markoap91]

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

[@HimanshuKumar-lg4jm]

Great

[@Danceofmasks]

Except when we banned the precise measuring of humans due to ethics.

[@sjoerdo6988]

Civilization 5 :)

[@markoap91]

@@sjoerdo6988 Of course.

[@jisperplomp5998]

I read this with the civ5 voice

[@endiewibowo400]

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

[@tieman3790]

Lazy bastard

[@celestinemachuca8930]

Somebody arrest him

[@SaugatChamling]

Help. Arrest him

[@legendarypussydestroyer6943]

It's actually 9.80665 m/s^2 lol

[@endiewibowo400]

Ain't nobody got time fo that

[@muhammadaryawicaksono4232]

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

[@guillaumeduport3283]

Woow ! Very eloquent episode ! Thank you Mr Veritasium !

[@theCodyReeder]

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

[@SidewinderScience]

Indeed I say we set planks constant to 1. of course this would require change a lot of other numbers in order to compensate...

[@theCodyReeder]

@@SidewinderScience Worth it.

[@angelslime7171]

Hi, love ur channel

[@timh.6872]

Making the numbers nice would change all the existing measurement devices and make them useless, as long as we're redefining an existing measurement system. Could we design a new system of measurement with very round numbers for all the constants? Maybe. The system of equations defining the solution space may not hit rational points of ℝ⁷, let alone a rational point with finite decimal expansion. The neat thing is that now we know we can build such a metric and have it be usable.

[@floriang2801]

Isn’t this what theoretical physicists mostly use? (they rarely calculate things using the SI)

[@IanChristopher]

Finally those constants are constant

[@adeshpoz1167]

Hahaha

[@nischaysoni502]

Holy true

[@michaelbuckers]

Expect a lot of revisions of these new "constant" "constants" as our measurements improve more and more.

[@slevinshafel9395]

Haha you are right. Hahaha

[@floriang2801]

Mi 28 I guess they will really be constant. Just like the speed of light that was defined some time ago and did not change since then.

[@SpiderElm]

So prince philip dies and i get this jn the recommends

[@RobinLundqvist]

same

[@urielc918]

Same

[@mr.winter538]

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.

[@zinc_trioxide]

So this update patch some bugs? nerf? buff?

[@pcy7255]

Looks like its gonna be a bug fix but feels like a nerf tbh.

[@shafwandito4724]

Bug fixing. No nerf and buff because it still balanced. Imperial is the one who need to be nerfed because a lot of confusion from the rest of the world

[@2adamast]

It's based on one unique instrument, so it certainly leaves room for a bug. Science is also politics

[@mattharris7674]

It's simply a big fix. The current engine isn't 100% consistent from the perspective of the player, so this is just making things we as the players perceive consistent forever.

[@digitalunity]

@@shafwandito4724 you're gonna Nerf the system that even the only people using it agree is bad?

[@ywenp]

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

[@69Cil]

This comment refers to the channel PBS Spacetime, where the end every video ends with the word spacetime, in a different way each time

[@zionj104]

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

[@JBBell]

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.

[@kennethkho7165]

no, the fabrication of microprocessors is not as precise as 0.00001%

[@Persivefire]

look at how he aged so fast just look at it

[@wilkinru]

kids man. kids and 30s.

[@hirvielain9013]

Head & Shoulders

[@FunnyBus3rd]

I thought the same, so much white hair

[@advaithvalsan6339]

Wait, Aditya, you watch veritasium too?

[@DFTBA35]

Hes rocking that grey fox look tho

[@Neo2266.]

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

[@av8973]

X

[@kushdubey1111]

What about Stan Lee

[@TrialDragon]

He died

[@mjb405]

@@kushdubey1111 Stan Lee died

[@SAIYANPRINCE777]

And we still got a month and a half left, don't count your chickens just yet.

[@michaelcalizzi4038]

This is a truly brilliant and beautiful solution

[@radiusnorth1675]

Nice to see you in West Van.!

[@nicholaswilliams6475]

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."

[@karserasl]

Nicholas Williams In 100 years, with the rate technology evolve, children will absolutely know plank's constant by heart if they would like a job in quantum physics, and generally a job(theoretical), because all other physical jobs would be replaced by robots.

[@WakenerOne]

"Powerpoint?" In 100 years?

[@nicholaswilliams6475]

@@WakenerOne The equivalent of.

[@nicholaswilliams6475]

@@karserasl You're saying that robots will not have also taken over all the creative and intellectual jobs as well?

[@williamsmith6921]

@@nicholaswilliams6475 creative is less likely. Would you really want to by art made by an AI. Or watch a movie by one

[@Kuzia141]

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 :)

[@my3dviews]

Why go to University when you can learn the same things on youtube? 😁😎

[@NathanEntzRacing]

@@my3dviews only because KZbin doesn't give you a diploma lol

[@Benoit-Pierre]

Or your teacher did it on purpose ...

[@LA-MJ]

Kokia profo pavardė?

[@Kuzia141]

@@LA-MJ Kaškonas

[@aetbhieiils]

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.

[@cmyk8964]

“Why?” “Because that makes the kilogram equal to what we had before.”

[@jackmulder3038]

Americans: “no, I don’t think I will”

[@the_kraken6549]

I think the pound is defined as a fraction of a kg. But yeah it’s still really stupid that we use the imperial system.

[@kajetanmlynarczyk3345]

@@the_kraken6549 2.2 pounds is 1 kg

[@okie9025]

@@kajetanmlynarczyk3345 no 0.46 kg is 1 pound, not the other way around. Americans can't change anything

[@kajetanmlynarczyk3345]

@@okie9025 you realise if they are equivelant they are the same thing

[@ashtonaimes2299]

@@okie9025 Well, if you're going to be like that, its 0.4535 kg is equal to 1 pound, and if you round, its 0.45 not 0.46, also 1 kg is equal to 2.2046 pounds, rounded is 2.2, so his statement was more correct than yours

[@iquemedia]

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

[@pierreabbat6157]

The number of guacamolecules in a guacamole.

[@theoriginaltoadnz]

Lmao

[@theoriginaltoadnz]

@@pierreabbat6157 hahaha there'll b a meme soon

[@musiclover6481]

... and everyone will be rushing to buy the new TI calculators.

[@juicyclaws]

@@OctyabrAprelya don't you have to define what a mole is. Like do you want to find the mole of molecules? the mole of atoms? according to wikipedia it could be any "particles", e.g., atoms, molecules, ions, electrons, or photons. And how do you determine the total amount of anything in a mixed substance like guacamole? Seems like an impossible task

[@jalabi99]

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

[@simonhirschmugl5134]

They will most likely end up in museums.

[@qrdsn]

The big K will worth a crap ton then lol

[@RJiiFin]

And the vaults that hold them? Converted to escape rooms and megazone arenas?

[@mbrunnme]

@@qrdsn But how many Kilograms will the crapton be then?

[@radishpineapple74]

They will continue to be kept in secure, stable environments and weighed periodically. They represent some of the oldest running experiments on the stability of metals, so they still have scientific usefulness remaining. It is doubtful, therefore, that the scientific community will allow them to go into less controlled museum environments, which would destroy their scientific usefulness.

[@gendermal]

Finally, a very good video from you :)

[@dereklacy]

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...."

[@helveticalouie]

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

[@MWaheduzzamanKhan1]

LBs are defined by Kgs and if the defination of Kg changed, LBs will automatically change. That's a valid question.

[@Mosern1977]

@@MWaheduzzamanKhan1 - are you sure? Because I think LBs are the amount of grease equivalent in a stone with radius 78.32 inches lifted by a goat found on the flatbed of a F-150 pickup if the temperature is 65.23 F.

[@SteelSkin667]

Still 2,20462

[@skeletonwar4445]

@Joe Average Average response from am average guy.

[@Barrys_Workshop]

The US lb is defined as 0.45359237 Kg thus is tied to the Kg irrespective of politics

[@fakestory1753]

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)*

[@angelikaskoroszyn8495]

Castration November: Einstein was wrong and here is a better equation than E=mc^2

[@swordofdoom1517]

@@angelikaskoroszyn8495 there is. Its E^2=m^2c^4+mv^2 Also, good one.

[@windowguylol]

NNN? No nut November?

[@timdehaan629]

@@windowguylol yes

[@gwyn.]

So, being a virgin until 30 makes you a wizard. And No Nut for 30 days continuously makes you a scientist. Wow, 30 is the key number.

[@gamelaine]

YOOOO GUYS NEW 1.1 SI UPDATE JUST DROPPED LESS GOOOOOOOOOOOOOO

[@9megir]

Great content. Keep up the good work.

[@drunkenmonkey2437]

I lost weight while watching this video.

[@MmeHyraelle]

I exhaled co2 and sweated some of the mass i ate two hours ago :D

[@quintenluyten6382]

by typing this comment i left some sweat and grease on my keyboard, so i too lost some weight!

[@LeoStaley]

Also looks like Derek gained weight since his last video.

[@stephenfalken925]

was about to say the same 🤣

[@madiansaleem4317]

😂 good one

[@EpicBenjo]

This is MASSive news I'll see myself out

[@leodahvee]

I will also see MASSelf out

[@EpicBenjo]

@@leodahvee Oh damn

[@aryanpatel2924]

No, we MASSt stop this! This will cause MASS destruction to the art of puns! . . . ...wait...

[@0d138]

Yes, you do that.

[@animelovinggamer5712]

The art of the pun is a MASSterious one, and is not likely to die with overuse.

[@TjPhysicist]

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

[@skibur848]

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

[@FishAnimations]

Big K sounds like a drug

[@abdulazizaljuaid2888]

More like a drug dealer

[@SlenderScrub]

Big K gives me good kicks

[@cai6972]

Big Ketamine

[@FirstLastFirstLast]

Not really but ok

[@DinushaJayaranga]

😂

[@Beaudunk]

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

[@yxor]

Underrated

[@angelaphsiao]

It’s been long enough

[@bigbo1764]

America: “mass is mass!”

[@MattMcIrvin]

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!

[@HandToolRescue]

That's a Queen's engineering jacket!

[@Joe-bm4wx]

A what?

[@Ovechkin8484]

Joey Kendrick cha gheil baby

[@areevanier4315]

I thought it looked familiar...

[@AkshayPuli]

Did I also notice a ring on his Pinky?

[@tonycheung9358]

Yes, it is. It is in Queen's U campus.

[@Chris-pv6zw]

Does this mean Pluto is a planet now?

[@PADARM]

yes

[@zenvir1680]

No

[@hassaanrauf4349]

yesn't

[@bedantosen1540]

Bro god created us xD

[@SaugatChamling]

Non't

[@luciferscrotum]

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

[@bjarkelyk3518]

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

[@anamikarai7240]

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

[@TannyrSD3]

Can you elaborate? Im confused by your comment

[@Arestar42]

@@TannyrSD3 if your video is more than 10:00, you can put more advertisement in it.

[@joshuaosei5628]

I can never understand why people don't like youtubers making money. Why are they not allowed to sustain themselves, especially great channels such as these.

[@branden7704]

making 10 minutes of content isn't a problem. The problem is the people who make a video about a 2 minute topic and the spew BS for 8 more minutes just for ad revenue

[@tomasrosalesr]

Audible

[@euttdsiggh2783]

First Stan Lee, now kg Smh

[@paradox...]

You forgot Stefán K. Stefánsson. All of them are legends!

[@L3ON360Z]

Stephen Hawking

[@couch9416]

@@L3ON360Z avicii

[@Luisitococinero]

Pluto...

[@thephysicistcuber175]

F

[@Alto_C]

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

[@rafapedros9984]

Brilliant closing speech about importance of Science

[@siva2727]

It's the red wedding for units

[@harpfully]

@imshippyupup - I think you meant to ask "Who are the Bolzmanns?"

[@francescaa8331]

Haha

[@NeedsContent]

The Standards Committee send their regards.

[@polloprestigioso]

8:16 *_Hey! Vsauce, Michael Here_*

[@Drestanto]

We're no longer tied to physical objects. *Or are we?*

[@eleethtahgra7182]

@@Drestanto I could imagine him sideglancing at the camera with large rounded eyes behind his eyeglasses...

[@dani.phantm]

Veritasauce

[@MingJianYap]

waiting for Veritasium to do a howto basic

[@GalluZ]

@@dani.phantm *_Verisauce_*

[@OminousShadow]

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

[@nlpascal]

Fascinating. I really like the his episode.

[@James-le8gd]

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

[@PennyAfNorberg]

Or in that train?

[@striker851]

January 21 might be more relevant

[@Xadous1]

That would be disrespectful and unruly of them to do so.

[@jeromealday614]

11.11

[@thecommentnator1621]

Do it on January 18th

[@rzomg]

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

[@koddldir2313]

Nice one! 😂

[@mauz791]

How many rails is that?

[@Heilzmaker]

No sir. You've been ripped of. I recommend switching supplier if you are unhappy with the amount of dope you're getting. if you would like to give him the benefit of the doubt I would recommend buying a more precise scale. Good day to you!

[@andrewnicholas291]

No, it's just that you are being scamed

[@jacobwright4653]

I remember when a dime was .7g

[@heidolf6002]

one of the best video titles ever

[@orvarl-o2554]

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

[@zapfanzapfan]

Does this mean that I lose weight? ;-)

[@TheCimbrianBull]

ROFL! 🤣

[@d0themath284]

It means you are able to know your weight to a few more decimals of precision.

[@zbz1536]

just go onto the moon

[@sheriffwolf736]

z bz You do realize that wherever you are in the universe, your mass stays constant but your weight (which is in N not in Kg) can vary.

[@prathameshkanbaskar5444]

@@sheriffwolf736 r/woosh

[@BAGG8BAGG]

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.

[@BalkyBartokomous2525]

They are still linked to physical aspects of our world, they are just no longer linked to human-made objects. They are now linked to things like the speed of light and the vibration rate of atoms.

[@LeinRa-Reaction]

@@BalkyBartokomous2525 essentially, they are now based on constant physical aspects of nature. keyword being "constant"

[@AnaMendesPereira]

Well new instrumentation for "mass determination" is man-made an in our world. Electromagnetic force (despite an artificial but natural, constant but formerly unfixed value) used as proxy measure, might also suffer in itself from future deviations, dynamism is not something controlable by human kind, non contact forces like magnetism probably the least harnessed force theoretically. Thus re-measuring the old big k using the same innovative device might have now an additional error provided by the future apparatus' 'degradation' itself. A vicious cycle to go for.

[@gabrielcho999]

Sorry to say this but your pp measurement is still gonna be short

[@kurtilingus]

True, however they're still very much akin to "legal fictions" in the same way that those copies of Big K & it diverged: the *truth* is that they *both* lost mass over time, but for the sake of scientific consistency & continuity it was mandatory to assert that the ONLY divergence in mass came from the copies due to the inherent paradox involved if it was instead asserted that somehow "mass had lost some mass" instead. I just wish some *actual * wacky hijinx had occurred to either the kg or the meter prototype(s) across the decades & centuries that was totally mundane & unremarkable IRL, and yet was also like the Black Tuesday & Hiroshima/Nagasaki of the science world all bc some dipshit drunken Welshman or entitled snotty Francofrog picked up the thing in order to examine, buuuut whoopsie-poopsie, every one get your scale calibrators out! Well before the modern era too, obviously, lol

[@thisrandomdude_]

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

[@thisrandomdude_]

One year later, I was able to follow along with pretty much everything!! Feeling kinda proud ngl :)

[@RahmatUllah-uf3wy]

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

[@figoprovenza9513]

But steel is hevia than feathas

[@oussamabr5851]

Thei' bowth á kilegrem

[@Neo2266.]

*_I knó, Bot the’r bôtf a kilograM_*

[@RedLeader327]

Fake news

[@onemadscientist7305]

Ther beth a kilagrem

[@micahphilson]

"Thas rrite, the steew's heavia."

[@yezki8]

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

[@dlevi67]

Yes, but it has the same mass. Just as before.

[@gorgiascae5682]

Finally the solution to one of the biggest questions of humanity

[@dlevi67]

@@mufasah342 Don't be. It's just that a kg of feathers unless in a vacuum displaces more air than a kg of steel, and thus is buoyed by it a bit more. A few micrograms of difference.

[@nebula3576]

@@mufasah342 me too but maybe I wouldn't be if I watched the video instead of reading comments

[@theepicslayer7sss101]

well did you know that there is a difference with weight and mass? both have the same mass so no, but what weights 1 Kilogram on earth weight 1/6th of a Kilogram on the moon. but if it was mass, it would be the same Mass on earth AND the Moon (1Kg in both place) since one factors gravity(Weight) and one does not (Mass). also depending on how well packed your feathers are, they might "Weight" less with air because of Buoyancy(floating) in air. pressure of air or water(Gas/Liquid) makes lighter things go to it's surface so a less tightly packed Kilogram of feathers might not weight the same in vacuum so you "HAVE" to define it by Mass where it does not differ (not matter how tightly packed it is or not). now speaking of terminal velocity, the 1 Kg of feathers will probably drag more due to size and fall slower (specially of very spread out) unlike a 1 Kg Rod of steel with a thin diameter to better pierce the air.

[@OlaJesusAdebayo]

God bless Derek.... great work.

[@WarrenPostma]

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.

[@vladimirlenin4080]

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

[@exoticapple9s]

Yes, you are the chosen one.

[@josephstalin8423]

Vladimir Lenin you’re not the only one comrade.

[@dejan3366]

@@josephstalin8423 shut up traitor ! You are not my leader!

[@adamlovelace7572]

The pound is defined in terms of kilograms. So technically the pound is changing too.

[@josephstalin8423]

Dejan Vezmar No bread for you!! Back to gulag!!

[@Brian-pq2mo]

Derek looks 25 but his hair says otherwise

[@vlogsofanundergrad2034]

Sexist

[@mees29]

Not necessary a causal relation. Some people start early having white hairs

[@joshuacanuta1869]

My first white hairs appeared when i was 7, now im 17 and it is visible without paying attntion:(

[@mees29]

@@tbird81 ehhh, read the first comment.... "Derek looks 25". So: no! Those people do not necessary look old. Or you might be narrowminded.

[@mees29]

@@joshuacanuta1869 most men get more handsome with white hairs..

[@ahmadabdallah9819]

I love how youtube recommended this video just after Prince Phillip died...

[@anawesomepet]

He was never King.

[@professoremu2076]

@@anawesomepet correct

[@lawriealush-jaggs1473]

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?

[@metadragon7500]

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

[@dio.8598]

le big mac

[@hollowollowyeet886]

@@dio.8598 la phish fillêt

[@xyzw8452]

@@hollowollowyeet886 La Bigge Whopper

[@hollowollowyeet886]

@@xyzw8452 au largé friez

[@dwilliams435]

je voudrais LE GRAND K!

[@ReedCBowman]

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.

[@lunkel8108]

I think you are talking about natural units where stuff like the speed of light or the reduced planck constant are assigned a value of exactly 1 and then all other units are build on that.

[@pyropulseIXXI]

you realize you can just do this yourself, right? Mass of a proton is given in kg; now, just take the reciprocal of that, and that is how many proton masses there are in one kilogram If the speed of light is set to 1 speed unit, then the meter per second becomes about 1/300,000,000 lightspeed units

[@Haru-nee]

I second that...

[@nonexistentabnormalitydont28]

I love this dude Such passion

[@king124kine]

3:22 its the real fushigi ball

[@adi.mp3]

This is US's chance to convert to metric.

[@oussematrabelsi9429]

us uses metric tho and this change was done by the american NIST

[@HollywoodF1]

Nope. Nice try.

[@chloroplast8611]

HollywoodF1 use your guns and just shoot your old measurement units

[@ecksdee4087]

@@chloroplast8611 that's northern USA and Texas that's it

[@BPollard86]

The US implicitly uses the metric system anyways as the inch is defined as 2.54 cm (exact).

[@cup_check_official]

*The kg is dead, long live the KGB*

[@Voronza]

Hell yeah! Cause science channel is the most appropriate place for politics! :D

[@gravnine]

@@Voronza its a joke calm down

[@tombkings6279]

@@Voronza OOF

[@Menaceblue3]

@risB00 Krillin, Goku, and Beerus.

[@Voronza]

Karma Gone Blue

[@dcterr1]

I wonder if we'll ever have a system of measurement in which the standard units of mass, length, and time are defined in terms of Planck units (i.e., the Planck mass, Planck length, and Planck time), which rely solely on the physical constants c, h, and G. This probably won't occur until we can measure G more precisely.

[@nif4345]

That would produce big numbers

[@dcterr1]

@@nif4345 Yes, but we always standardize them by multiplying by an appropriate power of 10, or whatever base we'll ever be using.

[@AegisRick]

The planck's constant itself is in units of Joules, but that in itself is derived from: Kilograms, meters^2 and seconds^2. So you've used the kilogram to "define" the kilogram. Circular definition.

[@minecraftify95]

Planck time is the time it takes for light to travel planck length, and planck length is the length light travels in 1 planck time. Another circular definition.