3 Perplexing Physics Problems

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Why does shaken soda explode? Does ice melt first in fresh or salt water?
Thank you Squarespace for sponsoring this video. Go to squarespace.com to save 10% off your first purchase of a website or domain using code: VERITASIUM
This video features experiments that have been shown to me by science teachers over the years. Does ice melt fast in salt water or fresh water was an experiment introduced to me at the Utah Science Teachers' conference. The ring of metal over a chain demo came from a teachers event in Florida. The idea shaking a carbonated drink increases pressure came from an email.
Special thanks to Petr Lebedev for building the pressure gauge.
Links to literature are below:
Victims of the pop bottle, by Ted Willhoft. New Scientist, 21 August 1986 p.28
Carbonation speculation
The Physics Teacher 30, 173 (1992); doi.org/10.1119/1.2343501
Agitation solution
The Physics Teacher 30, 325 (1992); doi.org/10.1119/1.2343556
Filmed by Cristian Carretero, Jordan Schnabel, Jonny Hyman, and Raquel Nuno
Music from epidemicsound.com "Seaweed" "Quietly Tense" "Mind Shift" "Observations"

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2019/11/19

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コメント数 : 11 563

GreatSpaceGoat 11 ヶ月前

I have a pretty big physics problem that has perplexed me my whole life. The closest supermarket from where I live is 500 meters (roughly) and it takes me 12 minutes to walk there and back at a walking speed of 5 kph (3 mph). The problem is it has taken my father 18 years to make this trip and I want to know how this strange phenomenon has occurred.

glkglkglkglk 11 ヶ月前

This phenomenon has been observed to take place when there is a deficiency of a specific lactose drink in the refrigerator and the father steps out to source it .......

GreatSpaceGoat 11 ヶ月前

@glkglkglkglk ah I see. That would definitely define a cause but the phenomenon still shouldn't occur under this premise. This may require further testing.

Pradyun Gaddam 10 ヶ月前

This is most likely due to a phenomenon known as "disloyalty", in which fathers and other close family members have been known to spontaneously disappear, never to return

Hélène 10 ヶ月前

Aw, sorry to hear that. Something similar hppened to me too.

Qimi 10 ヶ月前

The known side effects of this phenomenon is also called as “Fatherless Behaviour”

Dominic Dudebro MTL 年前

I'm more impressed by the fly who flew through the ring while it fell than the actual ring trick itself lol

Ibo 3 ヶ月前

yea that was some incredible performance

VIRUSapes 2 ヶ月前

I was so impressed hahaha

Dru G. 2 ヶ月前

Impressive catch

A. C. ヶ月前

I came to see if more people had noticed that.

Dominic Dudebro MTL ヶ月前

@A. C. I'm baffled that he never mentions it in the video

FrostyRecluse 年前

The slow-mo audio of the ring falling down the chain has to be one of the most satisfying sounds I've heard

ItMeRagnarok 10 ヶ月前

slow motion audio is normally dubbed because the real audio is trash

y0y4y0 8 ヶ月前

that fly tho coolest fly ever

mega gatling pea 7 ヶ月前

sounds like chains in a medival dungeon or something

Hotdog Soundpads 6 ヶ月前

weird

M C 5 ヶ月前

You'd be interested in the sound of a nuclear reactor starting

Pat Glass 年前

When I was a kid, I discovered that you could stand up a straw in a glass of soda pop and miraculously, soda would come out of the top of the straw slowly like a tiny fountain. Back in those says, the straws were all paper. You have shown me the answer to this phenomena and I thank you.

Max Mustermann 10 ヶ月前

Not entirely. When you put a straw into any liquid the liquid is pulled upwards into the straw. That is called capillareffect, a combination of adhesion and cohesion counteracting ambient air pressure. The smaller the straw the higher the liquid will be pulled. That effect is used by trees and other plants to bring water from the root up to the top which can go up to 650ft (200m). The 'fountain' is the result of in the soda dissolved carbon dioxide being released within the straw because of the rough surface of the paper straw.

Koito rob 9 ヶ月前

@Max Mustermann No it's not. Stop making up your own words Einstein. It's called capillary action or capillary effect or even wicking.

Blackadder75 2 ヶ月前

but why did they call it a straw if it was a paper? or did they use real straws before that?

Roopjinder Singh 3 ヶ月前

The hardest part of the ring experiment would be catching the fly and getting it to fly through the ring to replicate the experiment exactly.

1⃣0⃣2⃣5⃣ Prajwal Nayak 21 日前

Which fly???

CJ Carpenter 年前

I was at a place where people were selling all kinds of puzzles and things and one that they were demonstrating was the ring and chain. The guy said he would give it to me for free if I could get it to stick on my first try. So instead of just going for it, I looked it over and thought for a second and pictured in my head what I needed to do to get it to stay. So I dropped it correctly and it stuck and the look of shock on the guys face was better than a free puzzle.

Traee 2 年前

Imagine writing a paper that can be disproven by attaching a pressure gage to the bottle

Charlie Franklin 2 年前

ikr. like what were they doing

SB 2 年前

@Sam Sam no a simple pressure gauge is and was available pretty much everywhere Even if a simple device that checks increase/pressure would work (example simple piping can be used to make a working pressure measurement using Bernoulli's principle(

EebstertheGreat 2 年前

It wasn't really a paper. It was an article in _New Scientist_ magazine. Still embarrassing, though. I haven't found any further reference to this article in old issues, so if they did get letters from the public, I don't know how to find them.

allastor 2 年前

@Sam Sam it was the 80s, not 300 B.C.

Sam Sam 2 年前

@SB oh ok nice.

pronoe 年前

I've learned the "flicking the bottle/can" trick a while ago like 10-15+ years ago and only learned today why that works. Thanks a lot.

First Name Last Name 4 ヶ月前

I knew about this but had not thought about it when the girl I liked was opening a soda so she got it all over herself. I felt like such an @ss hole.

Christopher Harris 16 日前

Gotta say, you going back and trying to make sure you properly showed how the food coloring worked is impressive and shows a dedication to your craft and being an educator.

Lilli Eide 年前

Imagine if there was an infinite number of perplexing physics problems, we'd never get to the explanation of any of them

Hateisme 7 日前

i love how there's alote going on in this video that it keeps me hooked . the way he moves from subject to another, adding something fun to watch, even the little Fly in slowmo. my brain doesn't get bored

Luc Meier 5 ヶ月前

In the slow-mo of the falling ring you see a fly flying away

Nowshad 4 ヶ月前

At 5:20 beneath his middle finger

Dale Lombardo 4 ヶ月前

That fly didn't just fly away, it flew through the ring and THEN flew away. Stunt Science Fly!!

Valantis Alatsas 4 ヶ月前

@Dale Lombardo the fly was a paid actor

𝕱𝖆𝖍𝖎𝖒 4 ヶ月前

10:44 you can see it again -_-

Geoff Costanza 4 ヶ月前

But the cameraman didn't capture the only part of the trick that shows how it works 🤦

Killbayne 2 年前

Imagine giving your friend a sip of soda and he just goes "ahhh, non-equilibrium beverage"

T0XiC 2 年前

Ah yes

Sdreizon 2 年前

Bababoey

Killbayne 2 年前

@Sdreizon Indeed Bababoey

anonymous stout 2 年前

What is baboboey?

Killbayne 2 年前

@anonymous stout JPvidr "Twomad" uses that as censoring swear words

Christopher Sennett 年前

When looking at the salt water glass (around time index 6:37), if you look carefully, you can see a difference in the layers between the fresh water from the ice cube, and the salt water that the ice cube is floating in.

Woody♪ 11 日前

I thought the fresh water melted the ice cube faster because it's freezing point would be higher. Thus a great difference in temperature between the ice cube and the water's freezing point than with the saltwater

John Lee 2 ヶ月前

So shaking the bottle doesn't change the equilibrium letting more gas come out of the soda liquid, but shaking just generates lots of catalytic particles (tiny gas bubbles) lowering the barrier which can be removed easily by tapping the surface. Amazing!

Nm rj 年前

Salt water melting can probably also be explained by the phenomenon of depression of freezing point.

William Wolf 年前

Could you produce an item like a mentos but with far more surface space for the coke to interact with?

Jakub Narębski 3 年前

About the second problem: ice cube in fresh water and in salt water - why not use thermal camera (with time-lapse) to see what is happening?

Veritasium 3 年前

🤦 should have thought of that

AlienXtream 3 年前

@Veritasium make it a follow up video or something like that :D

jomic 3 年前

also if you look close enough you can actually see the phase difference in the salt water glass. As well as the color from the colored ice cubes accumulating at the top of the salt water glass :)

ANYONE GOT A SNICKERS BAR? 3 年前

Too expensive

LetsPlayCrazy 3 年前

was my first instinct as well :D And when he was doing his future thingy I thought "ah he thought about it" ... still nope :D

Kracker Bear 4 ヶ月前

Shaken Bottle: Shaking the bottle doesn’t change the pressure, it changes the direction & velocity of the pressure. Opening up the bottle creates an opportunity for sympathetic pressure vectors to generate a “greedy cup” effect using a fluid dynamics property where the fluid in contact with the surface area with the hole generates a ring of inflow while the fluid in the Center is outflowing and the where the 2 fluid flows opposite generates mini vortices trapped between the pressure of the 2 flow streams. I think. Definitely maybe.

Senthil Kumar S V 4 ヶ月前

It will be absolutely fantastic if you guys can make educational videos of maths and biology more often

K Patil 年前

Biggest takeout from this video...if you see bubbles on the inner wall of the soft drink bottle, just tap the wall to get rid them and safely enjoy your fizzy drink 😄

Zakir Anderson 4 ヶ月前

The chain and loop thing can happen in an similar but opposite effect for rock climbers, as the climber falls the rope can uncouple itself from the carabina, if placed at an incorrect angle.

ToastyFresh 3 年前

This man not only told us how bottles explode but how to prevent it Give him a salute

Aladato 3 年前

You prevent it by not shaking the bottle. He went further, he told us how to *revert* the shaking. Give him another salute!

Virat Kohli 3 年前

@Aladato *RESPECC*

Kaiser Matt Tygore 3 年前

The sad thing was I totally knew about the side bubbles when I was a kid, and just forgot about that whole thing as an adult :(

Kat 3 年前

🖖🏻

RedPandaMurphy 年前

One physics problem I think a lot about is the drop of a stone from a rising hot air balloon. It still has momentum so it comes up a bit but then succumbs to gravity.

peteiis easy 年前

Cool

Juraj Barták 年前

I like your videos , entertaining and educative :) Keep it up , good work mate !

Kevin Moor 9 ヶ月前

Sometime later: In the UK some pint glasses, designed to serve heavily carbonated beers, often have an engraving inside the bottom. This causes the beer to fizz up with a greater head as it is poured from the tap

Arthur Bis Hoffmann 11 ヶ月前

Here in Brazil, we usually put a spon in the bottle so that the soda don't lose the gas. I don't know why it works, but it work for like a day or two, and it's still drinkable

Jed Gould 年前

Maybe someone else thought of this but since salt water is heavier, a fresh water ice cube would float higher and therefore be less prone to a fast melt. Like icebergs.

Perplexeus 3 年前

He went back to his roots, challenging wide spread science myths

pyguy 3 年前

Happy to see more of this

Arun Kumar 3 年前

@Beejay Kisses I guess we now know who is the actual fool here. Thanks for giving us the evidence.

Random Dude 3 年前

@Beejay Kisses You should be in MIT, genius. Don't waste your time with us mortal fools.

marek klemes 年前

Similar to the ring latching on the chain, an inverse kind of trick is to pull off any elastic from a large number of them looped around the same stick. Pull on your chosen one away from the stick, then pull the loop over the top of the stick and you will liberate only your chosen elastic while leaving the others on the stick, (instead of having to pull off all the ones above it or something equally messy).

Heywoodja Look at That 年前

One of the only things I still remember from high school physics...shaking the bottle doesn't increase the pressure, it allows the gas to more easily separate from the liquid.

Rumo 9 ヶ月前

The trick with the removing of the bubbles on the walls is genius!

Zohair Badani 年前

ive been flicking the sides of soda cans for years because they said to do it in a science video, and it works, but up until today, I never knew why it worked

incon 年前

My mom taught me with soda cans (not bottles) that if you want to prevent it from exploding after shaking it, you tap the top of the can. Never made sense why but now I finally get it

Jeff Love 3 年前

Paper straws that come wrapped individually in plastic. Genius.

exerxac 3 年前

usually warped in you DIDN'T guess it more paper

Wbannie Dylan 3 年前

@exerxac plastic straws covered in paper wrap lol

acs197 3 年前

Only paper straws I've seen are wrapped in paper.

Berb 3 年前

Just buy metal ones. I bought a set of 6 bent and 6 straight straws some time ago for about 10 bucks. I'll never ever need a plastic, or god forbid paper, straw again!

bo jackson 3 年前

The Berb pretty sure paper straws aren't a thing

maddenker 11 ヶ月前

Note that salt water gets colder than fresh water with ice in it, lowering the rate of heat flow to the ice.

Mark Bergendahl 年前

Great explanations for phrnomena that we took for granted but never actually understood. Well done !

Nicole Wreyford 11 ヶ月前

I think it would be cool to see how the results of the ice experiment varies when you use a fresh water ice cube in the fresh water glass and a salt water ice cube in the salt water glass. You can also test using salt water cubes in both glasses and compare all the combinations. Very nice video.

Don McLoud 年前

Your videos are a fresh air in internet, finally both entertaining and intellectual content, that is the original purpose of the great network - sharing knowledge and experience

Scott Allen 年前

What would happen if you did the icecube test in a shallow dish with the ice touching the bottom?

Pol Gabaldon 3 年前

Can we all take a moment to appreciate this fly flying through the ring in slo-mo? 5:26

Green Studios 3 年前

Pol Gabaldon thank you

QuantumSoul 3 年前

Opened the comment section for it

Frey Vestergaard 3 年前

Nicely spotted

Luz Herrera 3 年前

I thought it was a spider!

RDSk 3 年前

It also went through a falling ring!

Richard Jensen 4 ヶ月前

If you drop a soda can or 2L bottle but need to open it quickly anyway, you can simply squeeze the container hard for around 10 seconds. This creates overpressure, which causes the nucleation bubbles to diffuse back into solution, and you don't get an explosion. I have tested this on countless dropped beverage containers, and the squeeze method works more reliably than the tap method. You can get the "feel" of it by using a 2L bottle, so that you can see through the walls and observe what's happening. You do have to squeeze quite hard, and the amount of time varies by the volume of the container. But I have won bets by assuring the skeptical that I can violently shake a 2L bottle and then open it without incident within fifteen seconds and no tapping. Or, I'm just yanking your chain knowing that some people are going to try this and get blasted! Hehe.

BraveNewWhirled 年前

You should do the experiment where you tap on the side of a plastic bottle filled with supercooled liquid. The effect is very fun to watch when using a clear carbonated beverage such as mountain dew.

fly bobbie 年前

At school we made a freezing mixture with ice and salt to freeze water in steel tube to split it. Couldn't understand why salt didn't melt the ice, but makes a crackling noise. Fizzy drinks taste better with paper straws. When plastics appeared drinks tasted different.

Prasad B R 年前

The salt water and fresh water demonstration was incridible

Jadon Nelson 10 ヶ月前

I was hoping he'd mention how salt melts ice on roads by lowering the specific heat and therefore making the water melt at lower temperatures, which IS why he mentioned that the salt warmed the water just by a little when he put it in the glass of water

Isak Jones 年前

That's how I've always dealt with carbonation, flick the walls of the bottle or can before opening. Everyone always thinks it's amazing, never knew why it worked but now I do

Ethan Stephens 年前

Me too, I didn't know why it worked, I've just always done that.

Rachel V K 年前

Thanks for the idea.💡

Doug Swainson 年前

It only works with certain carbonated drinks, my chem teacher said something about it not working with diet sodas or something

Trevor Edris 年前

John Dorian 3-tap method

Isak Jones 年前

@Doug Swainson I drink a lot of carbonated drinks, I know it's not healthy, but I've never met one it didn't work with. I've actually gotten into a habit of shaking them up and tapping them before opening. Regular, diet, zero sugar, Sparkling water.... Works with everything I've tried

Peter 年前

I thoroughly enjoyed this science talk and learnt quite a lot then I would in class. Thank you! Now onto your next video as I down my non-equilibrium beverage 🥤

Bence Kalmár 9 ヶ月前

If you drop Mentos into a Diet Coke, the reaction is far less than in normal Coke, so maybe the sugar and other chemical elements play a bigger role here.

J O 年前

Very interesting, I learned things today that I didn’t know. I thought the solid water experiment will be faster because the chemical potential of ice versus the chemical potential of water in salty water would be a bigger gradient. But of course the density explains the whole thing. The next experiment to do, will be to stir the ice while melting

Max Mustermann 10 ヶ月前

No. 3 is depending on length and weight of the chain, distance between the chain strands and also on weight and rotation speed of the ring. The more you increase the length of the chain, increase the weight of the chain, reduce the distance between the chain strands, reduce the weight of the ring or decrease the rotation speed of the ring the more unlikely it becomes to achieve the same result. It's like the phenomenon of a buttered toast falling from the table mostly landing on the buttered side.

LeGoat James 年前

The ring one is harder than I thought! Tried doing it and only did it about once in 20 times

Edouard Dubois 3 年前

The slowmo sound of the ring and chain was very satisfying.

Rojirrim 3 年前

Actually, the sound is made up. Sound at such slow motion videos doesn't make sense, and so it's manufactured and edited in the video afterwards just to make the thing feel better.

Rojirrim 3 年前

Daniel Kintigh Not about beating anybody :) just about letting people know. Since rapid cameras record high frame rates only to lower them at editing, they're effectively slowing time. Sound are air vibrations, and pitch is a sense of the frequency of those vibrations. By "slowing time" 10 times, all sounds reduce their frequency by a factor of 10, and so many audible noises would become infrasounds, and other high pitch sounds would become very low. Weird stuff, but it's cool to see how people came up with the idea of editing audio and make it sound Slo-Mo like

Edouard Dubois 3 年前

@Rojirrim Huh, well whoever crafted that faux-chain-audio did a very good job of it.

Kai Hicks 3 年前

@Edouard Dubois Check this out if you want to know more about the process: jpvid.net/video/%E3%83%93%E3%83%87%E3%82%AA-aO7yzmc3ykw.html

MrSidney9 3 年前

SmarterEveryDay made a video about fabricating sounds for his slow motion videos. Incredible stuff

Miselfis 年前

I guessed right about the soda pressure. By shaking it, you’re not actually introducing more “air” (pressure) into the bottle, so it’d not make sense for the pressure to rise. We did the ice cube experiment in high school so I knew the answer to that one. We also used coloured ice cubes, which made me chuckle a bit when you realized that was the best way to show what’s happening. But I still don’t understand the ring thing. I replicated it myself, recorded it in slow motion from multiple angles, but I still don’t understand and how the chain wraps around the ring.

Doug Cleworth 2 ヶ月前

The saltwater to fresh water ice melt also may have something to do with the freezing point of the water as well as density. Fresh water is about 0 degrees, while salt water is a bit lower. sea water is more like -2 degrees. Just a thought.

Anders Rocket 10 ヶ月前

I once had the paper straw problem happen to me, but it was a licorice straw. Now I know why.

Mathew McLean 20 日前

Just a little interesting side-note to this video and these experiments. It's actually easy to tell if a soda is going to be flat before you open it. Just squeeze the side of the can or the bottle and if it feels easy to squeeze, that means the carbonation level is low.

Bram Weijgers 9 ヶ月前

The paper vs plastic is due to the polarisation of plastic and co2. Co2 tends to ‘cling’ to apolar sites because it is also apolar. Paper is less apolar so the bubbles will interact less and rise up quicker. The same reason causes glass containers to have less bubbles on them and be less fizzy than plastic containers. Ea beer from plastic cups vs beer from a glass.

andred cook 3 年前

How fast does a car need to go to make a flat tire support the weight of the car through centripetal force I’ve wondered this for years

Naumen 3 年前

I never thought about this and now I want to calculate it. But there are so many variables when it comes to tire base strength due to the compounds used and I'm not a tire expert :( very interesting though.

Boaty McBoatface 3 年前

There is only one way to find out

Keist Zenon 3 年前

and what about the gyroscope effect, is it significant?

Jasyyn Noe 3 年前

You'll have to define 'support'. So-called run-flat tires rely on very strong sidewalls to temporarily acheive this. How could you measure the contribution of sidewall strength vs centripetal force vs any other variables I'm not thinking about?

Charley Rocha 3 年前

@Rae S That speed is surprisingly low. However, it is virtually impossible to achieve with 4 flat tires in a regular car.

Oliver Challinger 年前

It makes sense, but I swear I feel the bottle hardening after a shake. Although it's possible I don't shake up new bottles out of self-preservation, as well :)

Nick 8 ヶ月前

This comment is 3 years too late, but for the salt water vs ice water demo you could show a laser beam passing through it. The refractive index should be slightly greater for higher salt concentrations, causing the beam to bend slightly at the diffusing boundary

Joshua Roebuck 年前

What would be amazing is if the universe's false vacuum was achieved by a similar rotation which, otherwise would have reached true 0, but was supported in much the same way as this ring is on the chain.

Titus Overmyer 年前

Agreed, paper straws are an abomination. I think they are around so people stop using straws altogether. I personally would rather not have one than a paper. If they didn't change the taste and dissolve faster than ice, I might get behind them.

Albert Hopfer 年前

Actually initially stating what salt does to water (cools) is also what happens when you drop an ice cube in to the salt water - the water cools around the newly introduced water (in its frozen state) the salt reacts with the ice cube (of water) slightly cooling the water temperature around that cube - so it melts slower over time as more ice becomes liquid water.

MRmisterG 3 年前

I really liked the trick you did with the ring, especially the part where you trained the fly to fly through the ring at 5:26 when you dropped it. Very impressive.

Anthony Ashdown 3 年前

Who else re-watched this at timestamp several times in awe of the fly?

Vee_ 4 ヶ月前

I just looked in the comments to see if someone else lol se saw this lmao

Shreyansh Dixit ヶ月前

@Vee_ same 😂

Harry Schaefer 年前

You almost make me feel sorry I opted-out of physics in my senior year of high school. "Almost" because I knew the trouble I had with chemistry (the math involved) would have doomed me with physics. When sitting in a trig. class, I excused myself, walked straight to my guidance counselor and told her "get me out of here!", a great decision for me. I transfered into a "speech and drama" class, conquered stage fright and even got through Shakespeare's "All the world's a stage" speech flawlessly in front of the class, and I'm a stutterer!

Ronan McKeown 年前

A Nobel Prize for anyone who can explain why running cold water on your wrists almost immediately stops the irritation in your eyes caused by cutting onions. It's well documented what causes the tears when cutting onions, but why would running cold water on your wrists stop it?

Matt Ellinger 11 ヶ月前

4:04 - 4:27 is literally the most satisfying sound in the known universe; i could listen to that for hours ♡

Phillip Crow 年前

I think the slow motion ring falling was the most satisfying thing I've ever seen.

PatrickTalksALot 年前

I was able to predict the first one, and understand the third, but the second was pretty darn cool!

Jarrad Scarborough 3 年前

Derek: works hard, makes smart science video internet: *_oh, look, there's a fly!_*

spoonicuss 3 年前

im glad im not the only one to spot it

Cam Snell 3 年前

It's at 5:20 people, if you need to see it. This needs to be a meme

spoonicuss 3 年前

@Cam Snell its my first ever meme as such im not skilled to realy make viral ones but i must admit im proud of it i put jimmy superfly snuka with a fly head and hence the joke jimmy defied physics by standing where he does lol not many will get the joke but its still funny though :)

spoonicuss 3 年前

@10:43 oh look theres another fly lol

Velocityraptor 3 年前

It looks like it's animated. But maybe not. idk

Leonardofmo 年前

The paper straw fact is pretty cool. After hearing that, something in my head *clicked* and i then realised why its so fizzy when i drank sprite with my straw than just my mouth. Even tho i had a metal straw, it seemed to have the same effect as a paper one. Anyway, thanks, nice vid

Liquidbraino 年前

Your channel and Physics Girl are my two favorite science channels. The only other thing on the internet that even compares are the Richard Feynman lectures - but my all time favorite is "Los Alamos From Below". I watch that video as I'm going to sleep sometimes.

Liquidbraino 年前

Oh yeah and "Smarter Every Day"!! How could I forget Destin?!

darko714 5 ヶ月前

Isn’t the freezing point of salt water lower than than the freezing point of fresh water? Wouldn’t that account for the increased survival time of the ice cube immersed in the salt water?

Denialz 年前

i remember making ice cream in 4th grade with rock salt, honestly looking back the best thing i learned in school

Agitprop Psyop 6 ヶ月前

The slow mo sound from the ring hooking onto the chain is so satisfying

Iqbal Umran 2 年前

The sound of the ring in slowmo is really satisfying

amer alkhateeb 2 年前

aspecially the last part when it clunks.

Hubert Jarechowicz 2 年前

Its fake

amer alkhateeb 2 年前

@Hubert Jarechowicz yeah I think it is fake cos the same sound was used somewhere else in another video

Hubert Jarechowicz 2 年前

I don't understand why givin prerecorded sounds on slow recordings, be better to gave original sounds (trsanslated in google translator sry xd)

Iqbal Umran 2 年前

Well i dont mind if its fake, as long as i enjoy it

DiefetteLimette 8 ヶ月前

very interesting video but i have to say one thing about the carbonated drink normally (at least in austria) if you buy a bottle with a carbonated drink in it and you shake it, the bottle will be harder to compress, which means that the pressure increases however we all know that it doesnt get harder to compress anymore after a sometime of shaking or just standing somewhere so if you ask if the pressure will increase, the answer to this question can be different, based on some variables

James Brewer 年前

It always warms my cockles to see a science / maths JPvid channel get millions of views. Restores my faith that humanity is interested in science and not what Paris Hilton, Kim Kardashian et all passed on their last toilet trip. Amazing videos by the way.

Christian Roed 11 ヶ月前

Great videos, thanks. Have you tried the problem where you have a ruler or piece of wood, support it on a finger at each end of the ruler, then move your fingers towards each other. They always meet in the middle. Can you figure it out?

Michael Haas 年前

Sure appears that the salt water ice cube was melting way faster than the fresh water.

Halvblodsprinsen100 年前

Well, i have one question in regards to the chain. Does the result depend on it being a ballbead chain? It is known that that type of chain acts different than others under certain circumstances, like the Mould effect in chain fountains.

Luca 2 年前

wish this guy was my science teacher, he makes it so interesting!

shadoradow 2 年前

Yeah

Caleb Lewis 2 年前

Yeah but imagine watching a documentary that he made during class

Cowspawner the Cringeworthy 2 年前

Imagine your science teacher advertises square space mid lesson

Totto87 2 年前

@Cowspawner the Cringeworthy Wouldn't need it by then since he's getting paid for teaching you. He got to make money somehow and these kind of ads and endorsements are the only adds I'm happy to listen to because the revenue goes directly to the creator.

Matt Eloht 2 年前

Well, he has got the advantage to be able to choose the (probably more interesting) topics by himself and don't have to follow a more or less strikt curriculum.

Nate Chen 9 ヶ月前

For the soda problem, is there a chance that by shaking the soda you are doing work to the soda, thus increasing the temperature of the soda. When the temperature increases, the solubility decreases, thus some of the co2 is then not dissolved in water. When you open the bottle, all the gas can come out. This will also explain why fizzy drinks becomes less fizzy if placed in rtp for a period of time.

LeyLey 10 ヶ月前

i miss the days when i was hyped about getting home from school to watch Nat Geo science and experiments shows, but discovering your channel brought me the nostalgia about discovering new things

PunkChachi 10 ヶ月前

Okay, but how did you train a fly to fly through the ring on command? That’s what I’m interested in.

Lukas Klüpfel 年前

Wow, now I got an explaination on why tapping on a can of beer actually makes it not spill. Thanks :)

Malcolm Tieman 年前

Have a look at the very clever design of pressurised soft drink caps, there’s a lot of clever thinking in how they work !

Steven Spencer 3 年前

When I was a kid, I was taught to tap on the top of coke cans before opening them in case they had been shaken or dropped. I never really thought about why this would help. Turns out I was removing nucleation bubbles.

Arlo Mathis 3 年前

Yes and no. The tapping doesn't do very much if anything, it's the waiting that does it.

Justice Higgins 3 年前

NK_20 but he just showed that it does and why in the vid...

Chicken Muncher 3 年前

NK_20 no, waiting just means you are waiting for the bubbles to come off of the walls of the bottle, but tapping them gets rid of them from the walls, meaning it won’t fizz up as much

Clayton Thomas 3 年前

Steven Spencer sameeeeeeee when he was taking abt the air bubbles I automatically thought to my self y do my friends do that to a come bottle 🤣😂😂

Dirty Poul 3 年前

Tapping on top doesn't do anything. Tap it on the sides instead.

yli 年前

When you boil water in a closed wok, the noise actually increases and then decreases before reaching boiling.

Graeme Gunn 年前

The third one always amazes me, even when you see it in slow motion it looks like magic still.

Jigger Jones 年前

Whoa, this video validated my belief on how the natural universe formed. THANK YOU, VERITASIUM!

FlamingKami 年前

You can use the "law of perfect gases" to determine the question with the soda bottle. [V(sub1) x P(sub1) / T(sub1) = V(sub2) x P(sub2) / T(sub2)] This basically states that if pressure, volume, or temperature change, one of the others will be affected in some way. The volume of the container cannot change, and the temperate of the bottle's contents don't change either. So someone can reasonably assume that the pressure would also be unchanged.

Share Premium 年前

Infinity Master 年前

I guessed wrong on the first experiment, but I'm happy I guessed right on the second experiment (I guess those school chemistry lessons really did benefit me for once lol).

Henry Cam 3 年前

I've seen enough Veritasium to know when I'm being asked a trick question.

hypehuman 3 年前

Yeah I figured it they might be trick questions, but I answered the questions as if I was hearing them asked by someone who doesn't know the answer, and giving them my best guess. Which was wrong, of course :)

Mustanaamiotto 2 年前

I figured it out because i answered the poll, and 50% voted (and lied) that it on stays the same.

HenneDS 2 年前

Mustanaamiotto it did stay on the same?

Mustanaamiotto 2 年前

@HenneDS as in they changed their answer because they want to seem smart

cynder_blocks 10 ヶ月前

I always just assumed the paper straws were letting air through them and that's why I got so many bubbles

Patty Coffey 年前

It would be cool to see a video on carbonation in general, things like carbonic acids effect on oh, temperatures affect on the ability for a liquid to absorb CO2 and even chalk and other oh buffers interactions with those processes

Bean's Robot 年前

Hey Veritasium! I want you to cover this topic. There is a handpump near my house which sometimes throws water automatically without pumping. Why does that happens?