Why We'll Never Build a Perfect Clock

Рет қаралды 128,147

Күн бұрын

We can make clocks that keep accurate time for millions of years. We can also make clocks with such high resolution they tick one billion billion times per second. So why can't we make a clock that does both?
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Sources:
Dr. Florian Meier, interview
www.sciencealert.com/physics-...
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www.newscientist.com/article/...
journals.aps.org/prl/abstract...
journals.aps.org/prx/abstract...
journals.aps.org/prx/abstract...
www.quantamagazine.org/the-ne...
phys.org/news/2021-05-thermod...
journals.aps.org/prl/abstract...
spectrum.ieee.org/quantum-com...
www.tandfonline.com/doi/full/...
www.nobelprize.org/prizes/phy...
www.science.org/doi/10.1126/s...
www.vice.com/en/article/g5bx8...
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tinyurl.com/3dwbzrfv
tinyurl.com/2utv5aw9
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science.nasa.gov/image-detail...
tinyurl.com/2uxrp6w7
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commons.wikimedia.org/wiki/Fi...
tinyurl.com/ms54fshj
www.gettyimages.com/detail/vi...
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www.gettyimages.com/detail/ph...
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www.nature.com/articles/s4146...
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Пікірлер: 318

@wormspeaker Ай бұрын

"Sorry boss, I don't use my alarm clock anymore. I couldn't stomach contributing to the entropy problem."

@gastonmarian7261 Ай бұрын

When you're going to sleep, just tell your body you're waking up at (pick a number) 8am. You're surprisingly capable of getting up when you intend to without an alarm

@wormspeaker Ай бұрын

@@gastonmarian7261 That would be even worse, I would just be training my body to produce more entropy. 😱

@baomao7243 Ай бұрын

“I did it for the team. I chose to be late so that others could be more timely. Heisenberg say relax.”

@baomao7243 Ай бұрын

Phase-noise strikes again. Dammit.

@bobthegoat7090 Ай бұрын

Even better: "Sorry boss, I don't want to use my alarm clock anymore. I couldn't stomach contributing to the heat death of the universe. If the universe ended, I couldn't come to work"

@MitchBurns Ай бұрын

Electrical engineer here. Computers are already kind of running into that problem, and have been for years. Computers have been increasing entropy at a high rate for a very long time. It’s a real problem. We don’t usually think of it as an entropy problem, but rather as a thermal problem. The faster and smaller transistors get, the more heat they produce. And as many people know, heat is the most chaotic form of energy. So this really is an entropy problem.

@piotrd.4850 Ай бұрын

We're still faaaaaaaaaaaaaaaaaaaaaaaaar from Landauer limit. It's not power in transistor, it's power density at IC and problem with getting saidheat out. Node shrink causes overall drop in power, but also disproportionate die size shring therefore increase of power density.

@user-xj8wy4uu1q Ай бұрын

@@piotrd.4850cool

@hi-gf5yl Ай бұрын

Dennard scaling.

@MLeoDaalder Ай бұрын

And that's my cue to re-read the Discworld novel Thief of Time (by Terry Pratchett). XD It involves a plot by the Auditors (who want everything to stay exactly where it is and not move or change, thank you very much) duping a clockbuilder into building the most exact/precise clock, which then stops time.

@casualcommenter9730 Ай бұрын

Precisely my thoughts

@boogyboogyboogy Ай бұрын

I’ve only recently gotten into Discworld and completely fell in love- not that I needed any more reason to keep reading, but now you’ve really got my interest 👀

@BonnibelLecter Ай бұрын

I was thinking about it the whole video, lol

@thekingoffailure9967 Ай бұрын

Yes, makes sense! And my super accurate ruler that measures plank lengths eradicates distance??

@richardpaxford5792 Ай бұрын

"What damn elephant? There is no dammed elephant!"

@tommargolis7475 Ай бұрын

Thanks for the video! BUT: Entropy is not a measure of "disorder." A soap bubble is highly-"ordered" but is in its highest-entropy state. In fact, if you push a soap bubble to be more disordered - making it an amorphous blob rather than a sphere - it will pop back to its higher-entropy state: an ordered sphere. Entropy is a measure of probabilities. Smoke spreads throughout a room not because its order decreases, but because it is MUCH more probable that, at any moment, the smoke blob in the center of the room will spread than will shrink.

@JasonB808 Ай бұрын

But you forget that the soap bubble only looks like order because of the resolution you look at. Go down to the molecular structure of the components that make up the soap bubble and see that they all in entropy.

@thewiseturtle Ай бұрын

Right, the whole "disorder" meme is really confusing and backwards when it comes to educational stories in physics. Increasing entropy actually just means adding complexity, or adding more possibility, as you say. The higher the entropy of a system, the more unique, equally probable, orders it has. For example, add more smoke and more air to the smoky room will mean that you're more likely to find smoke doing all sorts of weird things - like making vortices and pretty aerodynamical patterns - than just sitting in one spot, or being totally perfectly distributed evenly around the room.

@ellieban Ай бұрын

Pretty sure you have to consider the soap bubble/air system, right? The soap bubble is a sphere because that’s what happens when the air inside is in its highest entropy state. If you push the sides of the bubble in, it may appear less ordered, but the air inside has been compressed is more ordered. I think.

@Catman_321 Ай бұрын

I like to think of it more like uniformity than disorder for this exact reason. Sure, it's not impossible everything clumps up independently, but as you and the speaker of the video said, it's much easier and more probable to resolve a mixture to a simple, evenly distributed, static system than to separate things into clumps.

@rickseiden1 Ай бұрын

I am one minute into this video right now, so it may be mentioned, but I have to congratulate the editor(s) of this video on the Easter Egg. It's kind of a thing that clocks and watches show 10:10 when shown in a catalog or a commercial. I don't remember why, but once you see it, you can't unsee it. This video is ten minutes and ten seconds long. 10:10. Nicely done!

@theshuman100 Ай бұрын

video is 10:11. reference failed. go to jail

@theuseraccountname Ай бұрын

@@theshuman100 You're on mobile. criticism failed. go to jail.

@JoulesCraft Ай бұрын

Wasn't there a news show called "10 10 Wins" that started around that time long ago? That's all that time reminds me of. Silly me, I clicked on your time stamp misreading to find the easter egg then, and it went directly to the end. The ghostbusters commercial about marshmallows reminded me of a cotton candy cloud kitty snow sculpture cat I named marshmallow that's becoming a documentary music video of easter eggs galore. so with cause & effect, adding them to our court case. #22JV222

@briansammond7801 Ай бұрын

@@JoulesCraft 1010 WINS is an all-news radio station in New York City

@theshuman100 Ай бұрын

@@theuseraccountname ✋😭🤚

@Sheamu5 Ай бұрын

As a watch salesman, I'm going to send complaints to this video.

@melodyszadkowski5256 Ай бұрын

lol

@nylonsteel Ай бұрын

Do so in a timely manner

@Tallnerdyguy Ай бұрын

It's all relative

@Karsonbarnes11 Ай бұрын

As a watchmaker, I wish all salespeople would listen to this comment. 😃

@jmr Ай бұрын

There's only one watch I've ever wanted. The Tag Heuer Monaco. The ad was in the back of Popular Science. I appreciate the unique approach of a belt driven watch. I could never justify the cost though because I don't like to wear watches. I'd have to mount it on a wall or something. 😂

@BenjaminCronce Ай бұрын

Current CPUs care a lot about synchronization. But there are asynchronous designs that are much more difficult that are faster and more efficient. They were used in the far past during the the exploration stage of computers, but synchronous designs are simpler and have been greatly improving over time well enough to not warrant the investment, yet.

@exiledpain6 Ай бұрын

I'd like to look more into this do you have anything I could watch or read up more on it?

@1ryannow476 Ай бұрын

@@exiledpain6 A quick Google makes me think he might be talking about "asynchronous circuits."

@willis936 Ай бұрын

Computers today do have many clock domains where inside of them there is asynchronous combinational and synchronous sequential logic. When the clock synchronization becomes unwieldy we just split it up into another domain.

@nowster Ай бұрын

Look for the ARM AMULET project. That was an asynchronous ARM CPU.

@BenjaminCronce Ай бұрын

@@willis936 Correct, and each domain can have its clock rate optimized for its usage. But there are actual async designs for domains, not just between domains.

@michaeltyrrell3381 Ай бұрын

“Time is an illusion. Lunchtime doubly so.” - Ford Prefect

@christopherlewis1847 Ай бұрын

@nelsonduel4784 Ай бұрын

I personally believe time isn’t an actual thing in the way we think about it. The past and the future are ideas that help us understand time but they aren’t actually real. Time is just the measure of change but the only phase of time that exists is the present and the present changes. That’s just from my brain trying to understand time along with a few videos about the subject so take it all with a grain of salt but it makes sense to me.

@SgtSupaman Ай бұрын

I see it the exact same way, and it seems to me to be the most realistic view. Time is just a measurement system, like temperature for heat or meters for distance. The past and future are important concepts we use but not things that actually exist.

@BrianThorne Ай бұрын

Sounds good to me

@thechosenegg9340 Ай бұрын

In philosophy, this is pretty much called presentism, where only the present is "real" (if I understood what you mean correctly), as opposed to eternalism, where past and future are as real as the present. I'm personally more on the eternalist side of things. I think we perceive time like we do, because we can't process all this information about the world at once, and thus take it bit by bit from one direction to the other. It is probably also easier to go in this causal direction, that gets more complicated later on, as opposed to starting out complicated already.

@Cyliandre441 Ай бұрын

I will now become a low tier batman villain with the evil plan to destroy all clocks to bring back order to the world!

@BanditLeader Ай бұрын

Anticlockman

@tarmaque Ай бұрын

@HermitHorologist I don't have time for this nonsense.

@joylox Ай бұрын

The video of the clock ticking randomly reminded me of when my solar watch was dying because it was winter and I was hiding it in my sleeves. It was so weird and got off track so quickly.

@bestaround3323 Ай бұрын

Well, I now have a new physics breaking magic item to include in future games. The perfect clock

@Respectable_Username Ай бұрын

8:29 Random Sydney jumpscare! So strange having stock footage of a place I've actually been 😛 (That's the foot bridge between Wynyard and Barangaroo in the city)

@kingkiller1451 Ай бұрын

My only comment is the reminder that while entropy and the flow of time are closely related increasing entropy DOES NOT EQUAL time flowing forward, or local decreases in entropy would be observable areas where time flowed backwards. That doesn't happen because entropy and time are related but not the same thing.

@EduardoRodriguez-du2vd Ай бұрын

But what is entropy?

@allanjmcpherson Ай бұрын

@@EduardoRodriguez-du2vd It's a measure of the number of states on the microscopic level (microstates) that give rise to a given macroscopically observable state (macrostate). If the number of microstates for a given macrostate is W, then the entropy of a system in a given state S = ln W. Since we assume all microstates are equally likely, it's effectively a measure of how probable a given macrostate is (though it's not the probability). I hope that helps, but I understand if it doesn't. Entropy is a notoriously tricky concept.

@EduardoRodriguez-du2vd Ай бұрын

@@allanjmcpherson Ah! Thank you! I get the impression that you are referring to the relationship between the structure formed by the microstates and the structure of the macrostate, as if they were two different things. As a question of structure and not of energy or average energy difference in a given space (which was what my intuition told me). Is it something just structural?

@allanjmcpherson Ай бұрын

@@EduardoRodriguez-du2vd I'm not sure I understand your question exactly. I'll try to give an example. Say you have a system of two particles and the system has two units of energy that can be distributed among the two particles. The macrostate is that the system has two units of energy. There are three possible microstates. The first particle could have both units of energy. The second particle could have both units of energy. Or they could both have one. For this toy example, the entropy of the system would be ln 3 since there are three microstates that constitute the same macrkstate. Does that help?

@EduardoRodriguez-du2vd Ай бұрын

@@allanjmcpherson Yeah. The example is useful to me. Regarding my comment, I will try to clarify what I expressed! :) Do you understand that entropy is a tendency, of the elements of the universe, towards a certain distribution? That this distribution is more probable after the interactions? Do we notice that a distribution is more probable and then consider that distribution to be more probable because we find that distribution to be more probable? The question would be why the trend towards a certain distribution is the most probable. Regarding the system of three elements, what I find problematic is the lack of definition of the concept of energy. The idea that comes to mind is that the universe tends towards balance (for some reason) and that the differentiated areas force the elements to act towards balance. Similar to what happens in the atmosphere (actually I guess exactly how it happens in the atmosphere!). But if that were correct, why this tendency towards balance? That is, why does the probability distribution have that tendency and not another? Otherwise, why do statistics show a certain type of results?

@TW-lt1vr Ай бұрын

Classic programmer's problem: time stamping your code within your code 😎

@sarcasmo57 Ай бұрын

Nailed it.

@_andrewvia Ай бұрын

It's time to say: Thanks Savannah!

@vonkruel Ай бұрын

I've got one high accuracy quartz (HAQ): my Bulova Lunar Pilot. So far it has been gaining 2-3 seconds per year. How is it so much more accurate than a typical quartz? 1. Thermocompensation (the onboard computer monitors the temperature & accordingly it adjusts timekeeping to minimize error). 2. Higher oscillation rate: e.g. 262,144 Hz instead of 32,768 Hz. There's more that can be done, too, such as: 3. using superior quality quartz crystals. 4. pairing each crystal with a computer that's been "programmed" with information about how _that particular crystal_ performs over a range of temperatures (Grand Seiko does this). Grand Seiko even gives you a "trimmer" in their quartz movements, allowing you to compensate for any drift as the watch ages over a period of decades or even centuries.

@vidal9747 Ай бұрын

At this point just get an atomic clock

@larryc Ай бұрын

Hello fellow watch enthusiasts! 😂

@anullhandle Ай бұрын

@@vidal9747that's likely cheaper (sort of) than these novelty watches. Specialized GPS receiver chips use averaged atomic clock time to adjust ovenized quartz oscillators. You get GPS atomic clock long term accuracy with crystal short term precision. Or you could rent or buy an old HP cesium clock off fleabay. These are precise enough to show time running faster at the top of a mountain :)

@anullhandle Ай бұрын

@@vidal9747they're likely cheaper and WAY more accurate. None will fit on your wrist some will fit in your cargo pants. High accuracy watches use a new (for a watch) AT cut crystal. Used every where else since 1934 since they're easy to make. The pocket sized standard uses an ovenized SC cut crystal which is more stable. The crystal is nudged using a GPS chip. You get long atomic accuracy with short term crystal precision. $150-2000 ish range. $2000 and up you could get a used HP cesium clock on fleabay. Small suitcase size but accurate enough to show how time runs faster at the top of a mountain due to relativistic effects.

@sydhenderson6753 Ай бұрын

See "Thief of Time" by Terry Pratchett for the physical consequences of succeeding in this quest. Atomic clocks can be pretty small despite the monster shown in the video. Not the super-duper caesium clocks, but the slightly less accurate rubidium clocks, which are used in GPS satellites.

@sydhenderson6753 Ай бұрын

I see there are lots of Pratchett fans here.

@christopherlewis1847 Ай бұрын

@sydhenderson6753 we are legion. There will never be another like Sir Terry. Nac Mac Feegle!

@AmateurTP Ай бұрын

Beautiful video

@KipIngram Ай бұрын

Nice video - well organized and nicely delivered. Well done!

@ZeusTheIrritable Ай бұрын

I knew my refusal to organize my books and video games served a purpose.

@chaunceyfeatherstone6209 Ай бұрын

I have been cornered by a philosophy major at a party. He claimed he was an optimist. He intended to write the perfect philosophical treatise -- and then die. It didn't occur to him (nor me, at the time, because we were both pretty liqoured) that the root of "optimist" was "to opt", that is: to choose. And when you're dead, your options are severely limited. Those people are weird. And this observation coming from a drama major.

@pixelmaster98 Ай бұрын

I don't think "optimism" has anything to do with "to opt". It simply stems from "optimal", i.e. "the best".

@columbus8myhw Ай бұрын

The similarity between "opt, option" and "optimist, optimum" seems to be an etymological coincidence.

@_apsis Ай бұрын

because it’s not. optimist comes from latin "optimus" - best opt comes from latin "optare" - to choose

@chaunceyfeatherstone6209 Ай бұрын

Riii-ght. You guys must be a lot of fun at parties.

@thechosenegg9340 Ай бұрын

@@chaunceyfeatherstone6209 they would, however, be very popular at philosophy parties! Source: I study philosophy

@krose6451 Ай бұрын

Thanks for the information. Im a bit too tired for this to really sink in so Ill have to come back.

@TreeCutterDoug Ай бұрын

This collision of philosophy and physics has melted my mind...

@chiphungerford Ай бұрын

The universe it’s self is a clock. If we could only measure all the entropy

@Tomservoca Ай бұрын

Jeremy Clockson and The Sweeper would like a word.

@tarmaque Ай бұрын

Tick.

@ESL-O.G. Ай бұрын

Entropy eats everything. Did anyone see the never-ending story movie? This is an old reference but some of you know what i'm talking about. The nothingness is coming to eat everything

@SuviTuuliAllan Ай бұрын

I bet the end was a mess.

@blakake Ай бұрын

I did. I still am actually

@thewiseturtle Ай бұрын

Entropy eats the past to create the future, where there is always more complexity, more creativity, more collaboration. It's evolution, but with matter and energy as the first "parents".

@ESL-O.G. Ай бұрын

@@thewiseturtle This is a very cool way to think about it

@LMacNeill Ай бұрын

I have a big ol' grandfather clock in my living room and I can attest that, at best, it might be accurate to plus or minus 30 seconds a week. (You have to wind it once a week, so that's when I reset it to match my Apple Watch). It's dependent upon *tons* of variables -- even walking past it can make it vibrate a little bit, and throw off the pendulum swinging. So it's definitely at the very low end of accuracy, and must therefore be contributing almost zero entropy to the universe. I rest easy knowing I'm not contributing to the chaos. 😂

@angelindenile Ай бұрын

I feel like this is a speed of light sort of thing, that the closer we approach the speed of light (perfection of timing) the more energy (entropy) we need. How interesting!

@ImplodedAtom Ай бұрын

There's no time like the present. Literally.

@steubens7 Ай бұрын

the most important clocks in high density asics are based on path length and the speed at which electrons move in that material, there's still 'clock' clocks, but things aren't really getting "smaller". timing closure happens at design time and it changes the geometry and layout so the logic works correctly at a given speed rating

@h7opolo Ай бұрын

fascinating

@pjdava Ай бұрын

SciShow, Yay! I liked this video so much, it made me smile!

@g137hampton Ай бұрын

It kind of feel like this more related to the uncertainty principle than is mentioed. I'll need to look at the paper and think about it. Thanks much.

@mbcommandnerd Ай бұрын

This is actually surprisingly accurate-ESPECIALLY in the watch world! If you buy a cheap mechanical watch with the absolute minimum number of parts required to keep track of time at all, then it’ll be very inaccurate and clunky-with minimal entropy effect. But if you buy a super high-end mechanical watch that costs thousands, then you’ll have tons of extra parts added (like extra jewels, swan neck regulators, fusee drives, etc.) that increase accuracy at the cost of added entropy. And god forbid you buy a Grand Seiko Spring Drive…hell, you’ll effectively have TWO SEPARATE WATCHES IN ONE that work together to tell time so accurate it’s second only to atomic clocks! But once again, that’s a LOT of extra parts, and therefore a TON of entropy. Not saying you shouldn’t buy one of those (it’s literally my dream watch tbh; by the way, this is not sponsored, and I don’t own one myself), but think of the entropy effect you’re creating just to get that hyper precision next time you look at one of those. Sometimes, simpler is better!

@Rodlaw99 Ай бұрын

awesomeness is a beautiful emotion 🎉😂

@Dyslexic-Artist-Theory-on-Time Ай бұрын

We need a deeper theory on 'time' and how the future unfolds! Only this will explain the paradoxes of Quantum Mechanics.

@fraliexb Ай бұрын

7:10 You think time is like a quantum particle, in the sense of the duality between position and momentum?

@blackandcold Ай бұрын

Doesn‘t need to be a particle. 99.9% of popular news never say that the uncertainty principle also applies to energy and time. There are many things still unclear foremost how relativity plays into it. Wikipedia article is a good read for people with basic physics/ math knowledge on university level.

@Eclyptical Ай бұрын

Wow, it's amazing that we can prove the existence of one of the primary drivers of our universe with such relatively simply apparatuses!

@tiffanymarie9750 Ай бұрын

Then there's life, seemingly anti-entropy until you realize it's actually helping speed entropy along.

@colinleat8309 Ай бұрын

I'm still working on understanding certain aspects of Thermal Dynamics. I'm comfortable with the Relativity's, but Thermal Dynamics can give me a bit of a brain hurt 🤣. Love the channel and subscribed emedietly when I found it a few days ago. Keep em coming please! 🤘😎🖖🇨🇦🕊️

@jonatanromanowski9519 Ай бұрын

Go Go Sci Show!

@fernbedek6302 Ай бұрын

Reminded of one bit from the Johannes Cabal series where he escapes a world without time by building a clock.

@christopherlewis1847 Ай бұрын

I know this makes me sound old, but all of the references to grandfather clocks reminded me of the old Johnny Cash song. Nice tune. If you are not familiar, i recommend that you look it up. While you're at it, look up This Land Is Your Land by Woody Guthrie. Great stuff

@Sugar3Glider Ай бұрын

8:00 The Infinity Hotel cannot have Room Service.

@giantsquid2 Ай бұрын

This video really "ticked" me off. 😁

@thomascoolidge2161 Ай бұрын

SpaceTime is relative... time is relative to your motion and any gravity well you are in. Taken to its extreme since we base time and space measurements on each other (meter is how far a photon travels ~1/300,000,000 of a second and a second is when light has traveled ~300,000,000meters) and we are in a gravity well, and the gravity well is moving through space.. time is always changing.. even if you have a perfect clock you would have to question.. is it really perfect?

@spgoo1 Ай бұрын

Evidently, one can't make a perfect thumbnail either. I think this has had a new one every 3 hours!

@elderfrost9892 Ай бұрын

a lot of youtube channels change their thumbnails to test which ones get more clicks, then leave the most successful ones and use that to improve them for the future

@vidal9747 Ай бұрын

You can actually measure a difference in altitude of meters using atomic clocks. Time flows slower when you are lower because there is less gravity from earth. So, you have a measurable effect in the most precise clocks depending on height. This is bizarre. Furthermore, entropy only shows where time points. It doesn't slow or reverse time. When entropy gets lower in part of a system, that part does not go back in time.

@kirillsukhomlin3036 Ай бұрын

Wow, kind of Heisenberg's uncertainty principle, but for clocks

@Ravenblues Ай бұрын

Philosophy PhD here, you summoned me?

@jeremyelser8957 Ай бұрын

When scientists talk about there being fewer ordered states than unordered states, how is "ordered" defined? Like sweeping up the pages sorted ascending is ordered, but which sequences are disordered. Would having all of the prime number pages arrive at the end be considered ordered or unordered? For almost any sequence, you could probably define a human-intuitive pattern that describes it if you're clever enough. The fraction of ordered patterns doesn't seem like it should be so human-centric. So how rare is finding an ordered pattern?

@Yupppi Ай бұрын

Makes quite a bit of sense. Pretty much in everything you run into the problem of consistency over time vs. accuracy in short time. The quickest practical example is weight monitoring. You measure yourself every day and get really accurate information. But it makes no sense in the big picture, it has too much information, it's too detailed. It has way too much variables affecting it, it has variance in play that you don't even know exists. In the long time span you get quite a neat average and an idea of where you're progressing but you really can't say you have any information of where you are any given day or moment. Or trying to picture some signal or movement visually. At some point you can measure things you don't even understand and your interest really lies in the macro picture, even though you want more accuracy and resolution. Suddenly you're measuring noise and light reflections, surface roughness and whatnot instead of the shapes or signal you're interested in.

@yellowflowerorangeflower5706 Ай бұрын

Cool

@kishfoo Ай бұрын

Fascinating! But I don't understand exactly what entropy is. Every particle is heading toward fusion or fission at the rate energy is being fed to them or being taken away from them. And everything is relative to the state of the observer. The only real constant that exists is change. This means that no matter how accurate you can make a clock to be, it will only be accurate for that particular moment in time, within a controlled set of variables, for that particular observer. Because atoms vibrate slower, the more momentum it has, which results in time-mass dialation. But what exactly is entropy? If you drop and crack an egg, entropy. But, at the same time, as the shell smashes against the floor, there will be calcium particles that, through impact, that will move an energy level closer to strontium. So, climbing up the periodic table is more entropy. What about fission. All that stored fusion energy is exerted and lost thermally, while the atoms that are spewed out move down a notch in the atomic chain. So, fission itself is anti-entropic, while its effects are entropic?

@robertneal4244 Ай бұрын

Okay...now my brain hurts...and I will probably think and dream about this for a while.

@my-alias-obviousleh Ай бұрын

If you tear up a book, throw it in the air and end up with two page 74's like in the illustration, try to remember how many books you tore up if the first place

@frank93907 Ай бұрын

Need that Laplace/Maxwell demon timing

@TheSwamper Ай бұрын

How does me, arranging the books on my shelf, making them more orderly, add entropy to the universe?

@TCONJ Ай бұрын

Thank you, Scishow! Very cool!

@LordBrittish Ай бұрын

Who else had System Of A Down singing *”DISORDER, DISORDER, DISOOOOORDEEEEEER!!!”* in their head at some point in the video?

@dawsie Ай бұрын

So this explains why over the 365 days the clock on the wall is almost 10 minutes slow. I ran a test last year two clocks one I kept correcting on the 1st day of the month and the other one I left alone.

@ScottLahteine Ай бұрын

Maybe we are already experiencing time in reverse as a matter of sanity-preservation, to avoid confronting the troubling reality of the future where we will each shrink down to a tiny size and fall into a watery womb, etc.

@dabrowskimichal Ай бұрын

Ok, but how do we know that whatever we use for a clock or a filter is ticking at regular intervals?

@pierrec1590 Ай бұрын

Furthermore, the more precise the clock, the more sensitive it will be to factors like gravity and acceleration. When we get to colonize other planets, il will be very difficult to synchronize anything.

@JungleJargon Ай бұрын

There are three rates to consider. 1. The diminishing effect or draw of gravity away from the center of mass. 2. The increasing rate of time away from the center of mass. 3. The increasing measure of distance away from the center of mass. Speed is measured by time and distance which change and that changes the speed of light and causation. Distance gets longer without gravity and time goes by faster, both of which speed up causation. The light has to arrive at a farther distance faster when distance is stretched *and* time also goes by faster. *Then* there is the first thing to consider and that is the diminishing draw of gravity which means things eventually slow down the farther away they are from the center mass of a galaxy. (It's not complicated.) 😎

@Khroniclas Ай бұрын

My digital clock refuses to stay at the correct time and you could say that it ticks me off.

@derekeboyd Ай бұрын

Could Fermi's paradox be explained by intelligent life requiring so much order that it creates an entropic bubble large enough to envelope large portions of, or even entire galaxies?

@vocalsunleashed Ай бұрын

I thought there was a new set with a chair, at least the past bunch of videos used it, but now you're back to the green background and standing up. Or was this recorded before the set change?

@irlikethis Ай бұрын

What if you use a ridiculously big sundial clock and have sensors for where the shadow is cast? Then you are removing a large chunk of the moving parts required.

@vonkruel Ай бұрын

The most prominently shown clock @ 2:33 has badly misaligned hands.

@codahighland Ай бұрын

I guess it's not true that a stopped clock is right twice a day, because that one is never right.

@youmaycallmeken Ай бұрын

Who came up with the phrase “Timing is everything”? William Shakespeare, in 1599, used this phrase in his play Julius Caesar.

@Apeiron242 Ай бұрын

By "backwards" do you mean the plural of the noun backward, or the infinitive tense of the verb backward?

@Fenrisson Ай бұрын

I really like to watch videos about entropy.

@bobthegoat7090 Ай бұрын

You are saying resolution comes at the expense of accuracy, however what happens if you just line up a bunch of attoclocks? Wouldn't that have both high accuracy and resolution? I know that would be a ridiculous big clock and is that a layman explanation of the fact we don't have infinite resources, as such a big clock would increase entropy a lot?

@sledgehammer9966 Ай бұрын

I dont get why adding more moving parts increases entropy of a watch. I also dont get how entropy is "produced" - sounds like energy being used; you know what I mean?

@Appletank8 Ай бұрын

How practical would it be to use an atomic clock to recalibrate the attoclock when it starts drifting?

@mellissadalby1402 Ай бұрын

I believe I have witnessed the conservstion of entropy, and when displaced, entropy proagates outward with 1/R squared losses from the point of origin.

@theodoreroosevelt7224 Ай бұрын

Basically regardless of your time span only a set amount of intervals can be counted accurately before something throws the system off and if you chose a shorter time span it'll happen faster.

@jacksparro3150 Ай бұрын

Ticks!

@Qermaq Ай бұрын

2:00 Technically, the page turns will be fine, as the pages are printed back to back. It's the left page tot he right page that'll be problematic.

@CorwynGC Ай бұрын

Nope, If page 1-2 is on page two, a page turn will bring you to 1, which is not fine.

@Qermaq Ай бұрын

@@CorwynGC You bested me. I pay fealty to you.

@timng9104 Ай бұрын

this brings an interesting question, is the uncertainty principle quantum mechanical or purely statistical mechanical.

@kairo9985 Ай бұрын

Time is relative, it would take otherwordly hardware since it would need to do constant calculation and synchronization of the speed and position in space of both you and the point of reference "at all times"

@vidal9747 Ай бұрын

@Centorior Ай бұрын

Actually, some humans have been experiencing a phenomenon where they see very short snaps of the future, but generally psychologists write it off as something else, or people just think of them as crazy.

@mattyclad9185 Ай бұрын

So essentially we should worry less about what time it is, or is, and enjoy the current time we have that we have now because we are making more chaos for the universe and us. ⏰ This could also maybe explain why time seems to go faster the older we get. Maybe our brains are trying to make the perfect internal clock.

@markgrace3247 Ай бұрын

P so Q is not equivalent to Q so P. You can't get an arrow of time from the 2nd law of Thermodynamics, you only get the arrow of Entropy. Also sounds like clocking making has reached the uncertainty principle.

@tr48092 Ай бұрын

While processors are getting faster, that metric is a measurement of how many instructions the entire processor can complete in a given time interval. This speed increase is achieved bia parallelism, not a reduction in the amount of time it takes to complete any one instruction. The fastest CPUs today, even for server grade hardware, run in the single digit GHz range. Their speed increase is due to having many more cores. Even the internal memory clock speed on cutting edge GPUs is less than 25GHz.

@aeroscorpian Ай бұрын

Side note: Yep... I'm going to have to go listen to Toxicity by System Of A Down after this ... I heard "disorder" too many times and it triggered the ADHD squirrel. 😂

@CorwynGC Ай бұрын

If the problem is not having an accurate rate of people toward the door, how can you have an accurate rate of door openings and closings? If you have an accurate door, just use THAT as your clock.

@PLuMUK54 Ай бұрын

Attoclock? Is that what Bilbo Baggins would have called a mechanical spider had he met one? I think that I'm becoming a geeky tomnoddy!

@approaching404 Ай бұрын

Biology is super super accurate and stuff

@SunShine-xc6dh Ай бұрын

How do you determine the inaccuracy of a clock without a clock?

@Karsonbarnes11 Ай бұрын

Not unlike watches, they do make timing machines to measure the accuracy of clocks although for various reasons they're not all too common to have within the industry.

@SunShine-xc6dh Ай бұрын

@Karsonbarnes11 so why dont they use 'timing machines' to tell time? If they are perfectly accurate and not just another clock that is

@Karsonbarnes11 Ай бұрын

@SunShine-xc6dh really a timing machine listens for specific noises in a mechanical time keeping device to essentially determine how accurately it is running in order to better adjust said device. Technically speaking, many timing machines have a clock built into them to display the time as well, but their main function is to determine accuracy without having to observe the watch or clock for several hours or days.

@SunShine-xc6dh Ай бұрын

@Karsonbarnes11 how does it know what an accurate clock sounds like without first hearing one and how was that clock determined to be accurate?

@jackloutsch6425 Ай бұрын

So they did an osha hearing test for accuracy of time in a way.

@TheDanEdwards Ай бұрын

Being stuck on the word "Law" hampers the explanation of physics. That word stems from a time when teleology was important in the learned halls of the academy. And mathematics is (in part) a language and while physicists use that language it is important to remember that equations (or relationships, mathematically) are used to _represent_ reality, and that mathematics is *NOT* the determiner of reality.

@thewiseturtle Ай бұрын

Entropy is NOT "disorder"! Unless you want to redefine it, and be confused about the universe, of course. Entropy is a measure of the number of possible unique states a system can be in. Increasing entropy is essentially like zooming in on a (non repeating) fractal. The reason the future is different from the past is that the future is infinitely open (fully random into the infinite future), while the past is limited, especially your personal past (where you've only experienced some small percentage of the universe/multiverse).

@JAGFG42 Ай бұрын

I feel like people get bogged down on this law, when in reality they are missing out on the more important in my opinion, Just cuse you shovel gravel from one pile to another doesn’t mean you have destroyed that matter. you have simply caused entropy or disorder in another location in space time.

@peterbonucci9661 Ай бұрын

For people that measure time a lot, the accuracy/period thing is obvious at normal scales. What did the scientists find out that's new? It'd be interesting if they showed that it continues to work even when quantum effects dominate.