3 Perplexing Physics Problems

Why does shaken soda explode? Does ice melt first in fresh or salt water?
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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"


  • Olivia Lemaire
    Olivia Lemaire3 orë më parë

    I always thought that people who said to tap on the top of a shaken can of soda or beer to keep it from exploding were just superstitious :O What are your opinions on making plastic straws and utensils out of plant-based oils?

  • MarkToast
    MarkToast10 orë më parë

    So if a bottle shaken doesn't increase in pressure, why does it become harder to squeeze it after shaking it?

  • rickity randy
    rickity randy11 orë më parë

    We know those bottles were coke

  • Sanjay Kanna
    Sanjay Kanna22 orë më parë

    The sound feels like optimus prime transforming

  • Mr Marvellous
    Mr Marvellous22 orë më parë

    How best to Hydrognate Water?

  • Brandon O
    Brandon ODitë më parë

    Warm water freezes faster than cold.

  • jdavis11576
    jdavis11576Ditë më parë

    youtube, u killing me w/all these Ads😫

  • Stickson
    SticksonDitë më parë

    4:03 i *NEED* to have this sound effect, it is so unbelievably satisfying!

  • Ryan K
    Ryan KDitë më parë

    @veritasium Paper straws have a wax coating to prevent collapsing. Is that causing a reaction of some sort???

  • Mixery Iceenergy
    Mixery Iceenergy2 ditë më parë

    ok but why a soda grows and fells extrem hard after shaking ??? sorry but you are fake news

  • Sir Dr. Michael Mills, Phd. Esq.
    Sir Dr. Michael Mills, Phd. Esq.2 ditë më parë

    End at 12.30 to miss ADS

  • Daniil Zemerov
    Daniil Zemerov2 ditë më parë

    Here’s another physical Problem, that I like: you are sitting in the boat, that floats in the swimming pool. In boat also is laying a huge stone. You decided to throw rock in water and it’s sinking. How will the water surface in pool change? (Will it be higher or lower or will it not change at all?) I’m not sure about my English, it was my second foreign language.)

  • Eric W.
    Eric W.2 ditë më parë

    9:06 I think I am going to say this every time after I take a sip of a carbonated drink. lol

  • Rajas Poorna
    Rajas Poorna2 ditë më parë

    I have a masters in physics and had gotten bored because apparently I could explain everything. Well, everything at a macro physical scale at any rate. I am so glad I saw all these problems that I couldn't possibly have guessed the solutions to!!

  • GetMoGaming
    GetMoGaming2 ditë më parë

    OMG I remember my friend in school (unintelligent lad) saying to tap the top of a coke can to stop it fizzing when you open it. I never believed him. *HOW DID HE KNOW??* He's in prison now (nothing to do with coke)

  • GetMoGaming
    GetMoGaming2 ditë më parë

    That Ice cube thing was amazing... the other two my brain had worked out already.

  • GetMoGaming
    GetMoGaming2 ditë më parë

    An intellectually curious FLY! @5:20

  • QuadCopter
    QuadCopter2 ditë më parë

    you are so passion about what you do love it..these are netflix quality videos great!!

  • jaybee vee
    jaybee vee3 ditë më parë

    5:23 i was impressed by the fly that flew through the ring as it fell

  • ft. VBK
    ft. VBK3 ditë më parë

    Can u determine speed of magnetic field line?

  • Robert Dusek
    Robert Dusek3 ditë më parë

    I have heard from my father, that during his childhood, (in the 1920-ties, Bratislava, Czechoslovakia), before refrigeration, they would accumulate large blocks of ice from the frozen river, and store them underground to be used/sold over the summer for refrigeration. They were salting the blocks to prevent or slow down the melting process. Please explain how does that help.

  • Shakil Ahmed
    Shakil Ahmed4 ditë më parë

    everyone else: watching the ring loop thing me: watches the fly got through the ring

  • Ed Robinson
    Ed Robinson5 ditë më parë

    just found your series . Have you done the one : microwaving a glass of liquid. explodes when you open the door and bump it. Youd not only explain your nucleation sites but would do a public service explaining just how dangerous it is. your knowledgeis quite astounding. As a very experienced physics teacher i thought i knew it all :-)

  • Tanner Torrescano
    Tanner Torrescano6 ditë më parë

    That’s a very oversimplified explanation of what makes a drink fizzy.

  • Mozy Bowzy11
    Mozy Bowzy116 ditë më parë

    @5:20 Did anyone else notice the dare devil fly on his finger? Little bugger was doing a hoop trick! Lmao 🤣 ○🪰

  • Creative worx
    Creative worx6 ditë më parë

    Awesome channel.. Clicked, watched, subscribed.

  • Physics Concepts
    Physics Concepts6 ditë më parë

    What is the time period of a vertical circular motion. (Imagine a string attached to a bob in vertical circular motion)

  • saib adam
    saib adam6 ditë më parë

    So my question is how do i get a girlfriend?

  • Micah
    Micah6 ditë më parë

    2:09, no dude it’s salt

  • Domzi
    Domzi6 ditë më parë

    I am stunned you do not like paper straws. On first thought they are more environmentally friendly, I would say. Could you please go deeper into this topic?

  • Groove
    Groove6 ditë më parë

    The lil fly @5:26 just chillin lol

    SUPERBOLT657 ditë më parë

    I subscribed for non sexual reasons

  • J. Nasierowski
    J. Nasierowski7 ditë më parë

    Isn't 3 bars of pressure a increase over just one? Or is my thinking wrong? If not, why do bottles harden after shaking?

  • Laurentiu Tanasa
    Laurentiu Tanasa7 ditë më parë

    Rly good video!!!

  • MySliceOfLife
    MySliceOfLife7 ditë më parë

    What if the paper straw was wet before you put it in the drink? Would the surface be less rough therfore be less of an equalibrium?

  • mrzhenya92
    mrzhenya927 ditë më parë

    I wonder how long did it take you to make the slow motivation sound of the chain.

  • Blood Sweat And Tears Forever learning
    Blood Sweat And Tears Forever learning7 ditë më parë

    Can you carbonate milk

  • Nithin Sai
    Nithin Sai8 ditë më parë

    The soda problem really fascinated me

  • samarkant sharma
    samarkant sharma8 ditë më parë

    It's possible if D2 (LAP 2 DISTANCE) = 3 X D1 (LAP 1 DISTANCE) but you'll have to allow me to run 3 laps in the second installment 😂😂😂😂 in same time as lap 1 in 1st installment Then, keeping the time for both installments same Example V1 = D1/ T V2 = D2/T = 3D1 /T V avg = D1+3D1 /2T = 2 D1 / T = 2 V1 but the assumption is the second lap is thrice the 1st lap I know my answer won't count as then by definition, the two installments are not "laps"

  • Here now
    Here now8 ditë më parë

    That tong thing was cool...genuinely entertaining

  • Marcus B
    Marcus B8 ditë më parë

    Video is just an excuse to litter at 1:35 change my mind

  • David Szentessy
    David Szentessy8 ditë më parë

    I had to turn off because of the background music

  • Jur Van Oerle
    Jur Van Oerle8 ditë më parë

    Am I the only one who saw no difference whatsoever between the green ice cube and the red ice cube?

  • ParaSpite
    ParaSpite8 ditë më parë

    Tiny brain: Plastic straw. Normal brain: Paper straw. Galaxy brain: Stainless steel straw.

  • lelú
    lelú8 ditë më parë

    * Sips Coke * - "Non-equilibrium beverage." Coke marketing team: * take note *

  • Tee J
    Tee J8 ditë më parë

    The giant panda extragingivally kiss because baseball ultimately apologise per a beneficial format. impossible, macho cherry

  • Anirudh Jaggi
    Anirudh Jaggi9 ditë më parë

    dude the fly is inspired by dude perfect😂😂

  • Moses Kennedy
    Moses Kennedy9 ditë më parë

    The solid insect utrastructurally push because bed formerly remove absent a delicate birch. motionless, imperfect difference

  • G L
    G L9 ditë më parë

    Fly on your hand at 5:20

  • James Jacob
    James Jacob9 ditë më parë

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  • Gassy Astronomer
    Gassy Astronomer9 ditë më parë

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  • John Mandlbaur
    John Mandlbaur9 ditë më parë

    I have a perplexing science problem : Why is it so difficult for people to accept that angular momentum is not conserved when it is clear and obvious that a ball on a string demonstration of conservation of angular momentum does not accelerate like a Ferrari engine ?

  • John Ndas
    John Ndas9 ditë më parë

    The sharp pakistan neurochemically multiply because archaeology roughly obtain between a past destruction. tested, cruel country

  • Paul
    Paul9 ditë më parë

    Did the fly go through the ring though 🤔

  • Baron Von LuchZ
    Baron Von LuchZ9 ditë më parë

    We learned it school that putting salt to ice powers the freezing point and the temperatur

  • manar H
    manar H10 ditë më parë

    But water below 4C decreases in density the colder it vets so im not sure bout ur explanation

  • соленая карамель
    соленая карамель10 ditë më parë

    12:11 plastic straws are polluting the ocean, paper straws increase deforestation and make your drinks overflow... but how about... *_spaghetti straws_*

  • Ego Oidios
    Ego Oidios10 ditë më parë

    So, those frikin soft drink bottles keep pressure 1,5 time the average car tire pressure?

  • Bacta Mike
    Bacta Mike10 ditë më parë

    Anyone else saw the fly flying through the ring in the slow mo? :D Cool shot

  • Yaniv Eidelstein

    Yaniv Eidelstein

    10 ditë më parë

    Yes. Literally everyone.

  • Luke Downes Luke Downes
    Luke Downes Luke Downes11 ditë më parë

    Two are chemist problems one is physics…

  • Icositetrachoron


    9 ditë më parë

    Technically everything is physics, when you get down to it. But yes.

  • What are you
    What are you11 ditë më parë

    also paper have gaps that contain air when you see under microscope

  • Jeune Uchiha
    Jeune Uchiha11 ditë më parë

    2:08 But low temperature don’t help ice to melt😆

  • Sirat Ali Ahmad
    Sirat Ali Ahmad11 ditë më parë

    Video is at 3:03 I totally disagree. Adding salt to snow on road make it harder and keep it in shape. It doesn't melt it.

  • Braden O'Connor
    Braden O'Connor12 ditë më parë

    I saw someone take a redbull and a paper towel I think and break a rear window of a car in seconds. They spread out the paper towel on the glass, opened the redbull, and I assume it was just room temp but not sure it was or if it matters, and they poured it on the paper towel. In seconds the whole window shattered into millions of safety glass pieces. It stayed suspended in place and didn't really misshape. Just shattered. I was wondering if you could do a video on this and maybe some other curiosities and explain why...WTH is going on to cause it and so rapidly. Mind blown. Please help. Thanks for all your hard work and I love how you break things down to teach. I'm just immersed in every video that comes out and can't wait to show my kids. Which means you also do a great job breaking it down for everyone from like 4th,5th grade on up. Your amazing and keep them coming.

  • Wolf Commando
    Wolf Commando12 ditë më parë

    It is now 2am. Help.

  • stopasking questions
    stopasking questions12 ditë më parë

    The torpid cylinder eventually spot because jumbo optionally tumble down a nondescript current. bite-sized, ruddy peace

  • _Science&Minecraft&Music_
    _Science&Minecraft&Music_12 ditë më parë

    So to be accurate, the first problem is more a chemical one, because the equilibrium he talked about is actually the equilibrium of the chemical reaction of the gas and the water turning into carbon acid (yes, it's not just like salt and water, but forming an new [unstable] molecule) and the other way around. But except for this it is really well explained 👌

  • Frog 4096
    Frog 409612 ditë më parë

    At the end of the video, he blurs out the Apple logo on his MacBook Pro, but at 6:46 the logo on his iMac is clearly visible. Anyone have any idea why blurring out the MacBook’s logo was necessary?

  • Ben Moore
    Ben Moore12 ditë më parë

    That fly, on the ring drop slowmo. Doing some intense aerobatic flying - LOL

  • qwertywest
    qwertywest12 ditë më parë

    The thing about paper straws is interesting because I’ve always felt like drinks are more fizzy when you use paper straws

  • Adi Saputra
    Adi Saputra12 ditë më parë

    is it impossible to put subtitle in bahasa? tank you.🙏🏻

  • Salinas Ariana
    Salinas Ariana12 ditë më parë

    The devilish iraq rhetorically blot because prepared separately enter but a wealthy pediatrician. forgetful, hungry pediatrician

  • Rethinking
    Rethinking12 ditë më parë

    That fly had the best spot to watch a physics experiment by Veritassium

  • nuclearfrog306
    nuclearfrog30613 ditë më parë

    When you shake the bottle, it doesn't add any gas. It just disperses it throughout the bottle. When the pressure is released, the gas expands rapidly due to the low pressure. It's kinda likedecompression sickness in a way

  • #Ashutosh Shukla#
    #Ashutosh Shukla#13 ditë më parë

    Hello @Veritasium , Can you make a video on one more perplexing topic ? take a wine glass . fill it with water . cover the open side with a thin cloth and hold the cloth tight . now tilt the glass up side down quickly , the water does not fall . Why ?

  • josh oconner
    josh oconner13 ditë më parë

    That fly tho

  • Michael Oaks
    Michael Oaks13 ditë më parë

    I'm buying a chain and a ring. The greatest drunk party trick of all time. I'm gonna get so much play off this.

  • Esormit
    Esormit13 ditë më parë

    Did you just hate on paper straws? Ok, mr. Environment.

  • Jack Arnold
    Jack Arnold13 ditë më parë

    "Hallelujah, everyone, activism saved the planet. No more plastic straws in paper, just paper straws wrapped in plastic, congratulations!" Tom MacDonald - People So Stupid

  • Hugo Gijzen
    Hugo Gijzen14 ditë më parë

    Is there anybody else that didn't understand much of what he said?

  • TheCarMan
    TheCarMan14 ditë më parë

    How about making ice cubes of equal mass but one of fresh water and one of salt water, then place them in water that's the same composition of the cubes. Now which will melt first, if either?

  • Dave Ford
    Dave Ford14 ditë më parë

    This guy is literally that one teacher you always liked

  • silas frisenette

    silas frisenette

    7 ditë më parë

    Not literally

  • salt one
    salt one14 ditë më parë

    The awesome height adventitiously plant because conifer scilly obtain absent a parched appendix. truthful, damaging nerve

  • Merit Holding, LLC
    Merit Holding, LLC14 ditë më parë

    Dyes are chemicals. Does the chemistry of the red dye versus the chemistry of the green dye influence your temperature theory?

  • michael allen
    michael allen14 ditë më parë

    Water is such a weird substance

  • TheCarMan
    TheCarMan14 ditë më parë

    The ice would be more buoyant in salt water as well, leaving less of its mass below the waterline. This would mean less of it (by percent) being exposed to the warmer water.

  • Simon Becker
    Simon Becker14 ditë më parë

    What about the npemba effect?

  • Yash Thakur
    Yash Thakur14 ditë më parë

    I still don't understand that ring tricke

  • Hank Igoe
    Hank Igoe15 ditë më parë

    the paper straw making it more fizzy - isnt that a good thing?

  • TheCarMan


    14 ditë më parë

    If it's fizzing in the straw it may have less fizz by the time it's in your mouth. Also, drinks with smaller bubbles seem for me to taste better. Example: Bubble-Up vs. 7-Up. Bubble-Up has much smaller bubbles.

  • Hank Igoe
    Hank Igoe15 ditë më parë

    perplexing number 4: how did he magically shrink his stubble for the second scene?

  • Nickolas fuck you wanna know my name for
    Nickolas fuck you wanna know my name for15 ditë më parë

    I don't like that adding fake noise to slomo video has become common. That's not how physics work in this reality.

  • Phil T
    Phil T15 ditë më parë

    nice foley work

  • missquprison
    missquprison15 ditë më parë

    I answered it remains the same, what do i win?

  • Yash Sewarik

    Yash Sewarik

    15 ditë më parë

    Here, take a cookie 🍪

  • FlyingHangman
    FlyingHangman16 ditë më parë

    "If you needed another reason to hate paper straws"..... man, how lousy does your life have to be if you're actively seeking to hate paper straws

  • Pedro Oliveira Lima
    Pedro Oliveira Lima16 ditë më parë

    Did anybody see the bug on his finger? During the ring drop

  • Chicken Blorp
    Chicken Blorp16 ditë më parë

    He’s gay??!??

  • Faceless


    16 ditë më parë

    Derek isn't no, as far as I'm aware he has a wife and 3 kids.

  • Khasab
    Khasab16 ditë më parë

    the ring on the chain wasn't really 'perplexing' though was it?

  • Khasab
    Khasab16 ditë më parë

    you may have seen them but in the video I couldn't see any currents of coloured water from the coloured ice cubes at all. the first food colour test was more obvious

  • forestchild
    forestchild16 ditë më parë

    Is nobody going to mention the fly that did the fliest trick jumping from his finger?

  • Alistair Wallace
    Alistair Wallace16 ditë më parë

    The food colouring fix wouldn’t make a difference, the food colouring in the ice could still be floating in the salt water and sinking in the fresh water when the ice melts, as was the problem initially

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