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Bellagio Fountains Recreated with Mentos and Coke

Trip writes "What happens when you combine 200 liters of Diet Coke and over 500 Mentos mints? It's amazing and completely insane. The first part of this video demonstrates a simple geyser, and the second part shows just how extreme it can get. Over one hundred jets of soda fly into the air in less than three minutes. It's a hysterical and spectacular mint-powered version of the Bellagio Fountains in Las Vegas."

29 of 220 comments (clear)

  1. Science so Rocks! by w33t · · Score: 3, Funny

    ...of course, now I've suddenly become very thirsty.
    --
    Music should be free

  2. In case of /.'ing by GillBates0 · · Score: 5, Informative
    Here's one of the the Google Videos of the feat.

    A number of different groups of people seem to have attempted it as the different versions available on Google depict.

    --
    An Indian-American Hindu committed to non-violent thought/speech/action alarmed by the global explosion of radical Islam
    1. Re:In case of /.'ing by LiquidCoooled · · Score: 5, Interesting

      Even our good old Taco has done one (with Chris Dibona and a couple of others)

      Its available on google video, but tacos Journal entry is here

      This fountain on eepy is amazing though, read the rest of the site because they give a decent explaination of how it works and the various other parameters (hole size, capsule construction)

      --
      liqbase :: faster than paper
    2. Re:In case of /.'ing by babba · · Score: 3, Informative

      Here's the link to the video file:

      http://www.revver.com/video/27335/

      And here are some of their other experiments:

      http://www.revver.com/tags/eepybird/

    3. Re:In case of /.'ing by dubbreak · · Score: 3, Informative

      I think this is the same one on youtube (two guys in lab coats with lots of bottles doing an impressive display?).

      --
      "If you are going through hell, keep going." - Winston Churchill
    4. Re:In case of /.'ing by Matt_R · · Score: 3, Interesting
      Kari from mythbusters in an FHM shoot (wearing only a lab coat & underwear) doing the mentos + coke trick:

      http://www.fhmus.com/articles-1276.asp

  3. According to the site, it's a physical thing by Omkar · · Score: 5, Informative
    Not chemical, so it should work just as well with other sodas/nucleation devices:

    "These chemists are saying that the primary cause is physical, not chemical. Their explanation: nucleation sites. If you have a liquid that is supersaturated with gas (like soda, which is pumped full of carbon dioxide), a nucleation site is a place where the gas is able to form bubbles. Nucleation sites can be scratches on a surface or specks of dust - anywhere that you have a high surface area in a very small volume. That's where bubbles can form.

    Mentos seem to be loaded with nucleation sites. In other words, there are so many microscopic nooks and crannies on the surface of a Mento that an incredible number of bubbles will form when you drop it in a bottle of soda. Since the Mentos are also heavy enough to sink, they react with the soda all the way to the bottom. The escaping bubbles quickly turn into a raging foam, and the pressure builds dramatically. Before you know it, you've got a big geyser happening!"

    1. Re:According to the site, it's a physical thing by w33t · · Score: 5, Interesting

      I had always assumed it was chemical. Interesting.

      You've given me an idea - I wonder if there is some way to suspend a substance within the fluid and create these nucleation sites simultaneously throughout the supersaturated medium?

      Perhaps some kind of ferrofluid? So you could run a magnetic field over it and cause the nucleation sites to appear which would cause the reaction to happen on a much more instant scale: read, explosive.

      Now, if only I had the material, and the knowledge, and the friends at MIT.
      --
      Music should be free

    2. Re:According to the site, it's a physical thing by bensafrickingenius · · Score: 3, Interesting

      Cool.

      Since the Mentos are also heavy enough to sink, they react with the soda all the way to the bottom.

      Leads me to the next thing to try: irregularly-shaped Mentos that would spiral down through the soda, instead of falling straignt down. I assume that the guys in the video used 2-litre bottles in order to give the Mentos the greatest possible falling path? A spiral path would have the effect of using bottles 2 or 3 times larger. Just gotta call up Mentos and ask for their rejected candies!

      --
      I am not left-handed, either!
    3. Re:According to the site, it's a physical thing by antic · · Score: 5, Funny

      For years, the big oil companies have been withholding a Mentos/Coke powered car from market... ;)

      --
      'Thats they exact same thing a banana wrench monkey.'
    4. Re:According to the site, it's a physical thing by Lumpy · · Score: 4, Insightful

      Easiest way is to get your hands on a cylinder of C02 a regulator a modified cap that fit's a 2 liter bottle with a c02 inlet and nearly frozen water.

      Cold water holds more C02 than warm water so you fill a bottle 3/4 full of really really cold water and pressurize it with CO2 to about 35psi, leave the CO2 connected and shake the hell out of the bottle until you notice that no more Co2 is entering the water (you can hear the regulator feeding more gas) crank the pressure up to 40PSI and let it sit for a couple of minutes in a cooler full of ice and water to re chill the bottle from all that heat you put in it during shaking.

      Start the shaking once again and then let it sit in the cooler for another 10-20 minutes under pressure.

      you should be all done with he most effervesent soad water ever created. carefully remove the cap and quickly replace with a regular cap (or build a cap with a valve for best effect and speed.) so you can let this puppy warm up.

      after it warms to near 40 degrees you can remove the cap (or open the valve) and simply thump the side of the 2 liter to create a massive fountian. sometimes just releasing the cap will set it off.

      You can also do the reverse just as easily. rapidly cool a 2 liter of pop to 20 degrees F without any shaking or vibrations. then thump the side and watch a wave of ice form from the impact site to solidify most of the bottle.

      Note, you must have a sugar/Co2 solution for the supersaturation freeze effect to happen.

      A side safety note: putting pressure on a 2 liter pop bottle is dangerous. you can kill yourself, friends, neighbors, take off your head, lose an eye, etc... but I have sucessfully cranked the pressure of a pop bottle to well over 80psi and a 1/2 liter to well over 120psi (made one hell of a rocket) but bottle pressure handling is very random. Be ready for the bottle to explode at all times.

      With my valve cap design that has a 3/8" valve opening and tube I can get nearly 100 foot fountians with the super high Co2 injection method I mentioned and they usually tip over and start trying to move after 1/2 the bottle is empty because they get too light and still have lots of power left inside.

      and a soda water fountian mess is easier to clean up.

      --
      Do not look at laser with remaining good eye.
  4. This is quite interesting by Anonymous Coward · · Score: 3, Funny

    despite it being a waste of food (is soda and candy food?). These guys obviously put alot of thought into the choreography and timing of their fountain. Kudos. There are two questions I still have:

    1. How much soda did they waste getting it right? and;
    2. Are they doing this anywhere near ants?

    1. Re:This is quite interesting by Jeremi · · Score: 5, Funny
      Are they doing this anywhere near ants?


      I don't think ants would be very interested in diet coke... it's sugar they like, and diet soda doesn't have any. Perhaps they would go for the Mentos though... nobody likes an ant with bad breath.

      --


      I don't care if it's 90,000 hectares. That lake was not my doing.
  5. That... is the coolest thing ever! by HellSpam · · Score: 5, Informative

    I've seen lots of cola and mentos experiments, but that was definitely the best one. Anyone who want to know how this works: http://www.stevespanglerscience.com/experiment/000 00109

  6. News for Nerds... by bsdluvr · · Score: 4, Funny

    ...Stuff that matters.

    By the way, does the diet coke react more in combination with the mentos, or are they just afraid of gaining weight?

    1. Re:News for Nerds... by HermanAB · · Score: 4, Interesting

      Sugar in regular cola makes sticky mess - the diet version doesn't.

      --
      Oh well, what the hell...
    2. Re:News for Nerds... by Elemenope · · Score: 3, Informative

      Also apparently diet sodas have a slightly lower viscosity due to the lack of sugar syrups, and so more poorly resist gas coming out of solution than regular sodas.

      --
      All the techniques ever used to make men moral have been themselves thoroughly immoral... (Nietzsche)
  7. Pretty cool, but... by Mr2cents · · Score: 5, Informative

    Ok, the experiment is a nice one to add to the list, but it's hardly "the coolest experiment ever".. I fondly remember two tricks when I was at college:

    1: put some hydrocloric acid in an empty (plasic!!) soda bottle, add some aluminum foil, close bottle, throw away.
    The bottle will start to expand and blow up making a very loud bang.

    2: stack a tealight on top of two other tea lights, making a small pyramid. Light them and wait until the top tea light starts to fume and then the entire surface will burst to flames. Then, carefully throw a small amount of water in the top candle. You'll get a huge ball of fire 2 meters high. Nice way to make clear why you should never throw water in burning deep fryer.

    Warning: these experiments are quite dangerous, so be careful, don't put your head above the tea candles, make sure you're at least 10 meters distant from the bottle, never use a glass bottle, think it through before you begin. Use common sense.

    Any more cool DIY experiments anyone?

    --
    "It's too bad that stupidity isn't painful." - Anton LaVey
    1. Re:Pretty cool, but... by Masato · · Score: 3, Informative

      1: put some hydrocloric acid in an empty (plasic!!) soda bottle, add some aluminum foil, close bottle, throw away. The bottle will start to expand and blow up making a very loud bang.

      ACK! Hydrochloric acid? That sounds like a Darwin Award waiting to happen. Liquid Nitrogen makes a pretty "cool" bang without having to handle any acids.

  8. Before I forget... (important) by Mr2cents · · Score: 4, Informative


    If you want to repeat the experiment with the hydrochloric acid: don't get near to the bottle, even if it doesn't seem to work. The aluminum and the acid produce an exothermic reaction that goes faster and faster as it heats up. So at first nothing much seems to happen, but once the acid gets warm, the reaction goes a lot faster, adding much more heat, making the reaction go faster etc.... You don't want a bottle with steaming hot hydrochloric acid exploding in your face!!!

    Also, the gas after the explosion does open up your sinusses, but I don't think it's healthy :-).

    --
    "It's too bad that stupidity isn't painful." - Anton LaVey
  9. What about Carbon Aerogel? by Bananatree3 · · Score: 5, Insightful
    from the eepybird website:

    " If you have a liquid that is supersaturated with gas (like soda, which is pumped full of carbon dioxide), a nucleation site is a place where the gas is able to form bubbles. Nucleation sites can be scratches on a surface or specks of dust - anywhere that you have a high surface area in a very small volume. That's where bubbles can form."


    Call me crazy, but what about using small bits of carbon aerogel? I know its expensive, but with 600 m^2/g of surface area, it would be a perfect canadate!



  10. See what happens when you try this in your mouth by tehgimp · · Score: 3, Funny
  11. Re:What.... what? by Anonymous Coward · · Score: 5, Insightful
    I think they should have a section called "Slow News Day".

    Yes, god forbid people have fun whilst experimenting. Perhaps you are not familiar with the links between creativity and scientific breakthroughs?

    I forgot this is stone cold /. news for the serious.

  12. Ultrasonic cleaner by moosehooey · · Score: 3, Interesting

    If you've seen the episode of Mr. Wizard's World, he did this with an ultrasonic cleaner like they have in jewelry stores. Works about as well as the Mentos.

  13. Re:awesome soundtrack by jaimekristen · · Score: 3, Interesting

    All original, you can buy the cd or check out other songs at Audiobody.com

  14. Good for Teaching Kids by natedubbya · · Score: 3, Insightful
    I can see why most of you find this pointless for slashdot, but this soda/mentos idea has been going around teachers and science education lesson plans for a while now. It's very popular with science middle school teachers and it gets your average apathetic 12 year old interested in science. So maybe not great for grown up slashdot, but it's still great nonetheless. Would be a great video to show in classrooms.


  15. Re:What.... what? by hdparm · · Score: 3, Interesting

    Can be science, can be fun, can be both - as tagged.

    I used to do this some 30+ years ago, while in primary school. Every day after school few of us would go to the corner shop, buy coke and pepermints and organise competition - everybody drops a mint into the bottle and whoever spils the least amount of coke, gets the next bottle purchased by the others. It's possible not to spil coke at all but terribly hard. We used .33 l bottles, though.

  16. Nope by delirium+of+disorder · · Score: 4, Informative

    Although Rummy is just about as evil as they come and the FDA approval process is unfair, I still trust Aspartame. Aspartame itself is not a "poison that attacks nerve ends"; although its components may have some health effects in huge amounts, typical food consumption is safe. It is approximately 180 times sweeter than sugar, so diet foods and beverages only contain a small amount of it.

    Approximately 10% of aspartame (by mass) is broken down into methanol in the small intestine. Most of the methanol is absorbed and quickly converted into formaldehyde. Some scientists believe that the methanol cannot be a problem because: (a) there is not enough methanol absorbed to cause toxicity, (b) methanol and formaldehyde are already a by-product of human metabolism, and (c) there is more methanol in some alcoholic beverages and fruit juices than is derived from aspartame ingestion. (Wikipedia)
    See also: http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd= Retrieve&db=pubmed&dopt=Abstract&list_uids=1218049 4&query_hl=2

    Phenylalanine is an amino acid commonly found in foods. Approximately 50% of aspartame (by mass) is broken down into phenylalanine. I can't see why this would be a bad thing. Phenylalanine is used in living organisms, including the human body, where it is an essential amino acid. Phenylalanine can also be converted into L-tyrosine, another one of the twenty protein-forming amino acids. L-tyrosine is converted into L-DOPA, which is further converted into the neurotransmitters dopamine, norepinephrine, and epinephrine. Research indicates that Phenylalanine can be an effective part of an overall program to fight chronic pain and depression in some cases, including the mood swings of premenstrual syndrome (PMS). Some sources contend that it can increase energy and mental alertness. So it's a natural amino acid that can function as a CNS stimulant. It can't hurt you any more then the caffene already in the pop, as long as you don't abuse it. (Even stronger CNS stimulants like amphetamines are fairly safe as long as you use a small enough quantity of them and maintain a normal sleep cycle).

    Aspartic acid is an amino acid commonly found in foods. Approximately 40% of aspartame (by mass) is broken down into aspartic acid. A lot of FUD has been drummed up about aspartic acid being an "excitotoxin". I really is just one of the 20 natural proteinogenic amino acids which are the building blocks of proteins.

    "...since aspartame is broken down into these components before it is absorbed into the blood stream, aspartame in its initial form does not have the opportunity to travel to target organs, including the brain, to cause cancer." (American Cancer Society)

    Animal studies HAVE found aspartame to be cancer causing, but no major human study has. http://seattlepi.nwsource.com/national/265559_soda 05.html/

    --
    ------ Take away the right to say fuck and you take away the right to say fuck the government.
  17. Osama squirts by Tablizer · · Score: 4, Funny

    Oh shit! Now they are gonna ban coke and mints from airline flights.