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Ice in 5 seconds?

  1. Mar 19, 2010 #1
    I can't seem to get this to work.

    https://www.youtube.com/watch?v=zQifsQjvxyQ

    Real?
     
  2. jcsd
  3. Mar 19, 2010 #2

    berkeman

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    Staff: Mentor

    Notice that they are in a freezer locker. The end of the video is edited to time-lapse it so that the hour it takes to freeze the glass looks like it happens in a few seconds.
     
    Last edited by a moderator: Mar 19, 2010
  4. Mar 19, 2010 #3
    You can clearly see where they cut and pasted the scenes.
     
  5. Mar 19, 2010 #4
    Okay, I can go with a video cut, but a freezer locker? With vinyl floor and weights on wooden shelves?
     
  6. Mar 19, 2010 #5

    berkeman

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    Staff: Mentor

    Yeah, you guys are probably right. At first it looked like a freezer locker, but a video cut seems more likely.
     
  7. Mar 20, 2010 #6

    DaveC426913

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    Gold Member

    How could they possibly think anyone would take this seriously??

    The entire lighting of the scene changes dramatically in the "few seconds" that the ice freezes.
     
  8. Mar 20, 2010 #7
    Because P.T. Barnum was right. EDIT: Now more than ever given population growth.
     
  9. Mar 20, 2010 #8

    DaveC426913

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    That is exactly what I had been considering saying. (I refrained out of conisderation for the OP.)
     
  10. Mar 20, 2010 #9
    I have been known to be blunt more often than not, especially when the perfect phrase has already been coined! :smile:

    Lets be frank, you're a much kinder person than I am online. I have already been called "hard-hearted" by the now dearly departed yotzzmun. :rolleyes: Now he was someone who really tested my restraint, and I think jtbell must have been feeling merciful when he didn't smite me. :wink:
     
  11. Mar 21, 2010 #10
    I do not claim to know how this works, but I have experienced this accidentally before.

    I put some bottles in the freezer, when I looked later one was frozen but the other was still completely liquid. When I took the liquid one out of the freezer, right before my eyes, it froze solid in a few seconds.

    Also on a morning when it was just at freezing outside I found liquid dew on my windshield I turned on the windshield wipers and as soon as they started moving the dew turned to ice instantly.

    Maybe the salt acted like the salt used to make ice cream in a homemade ice cream machine.

    I have no idea about the straw and fire.

    Can anyone explain how what I experienced works?
     
  12. Mar 21, 2010 #11
    The bottles: one was has some liquid unfrozen, and because of the expansion of the water as it froze, the water was either pooled in the bottom or top, or "smooshed" around the edged giving the ILLUSION of being unfrozen. You move it, and that liquid settles into a few cracks, or just flat out breaks the illusion.

    The dew on your car probably WAS frozen, but your car gets hot from the inside out, right? So you melt (partially) the dewdrop on the side of the window facing you (inside of the car). Hit the wiper and what LOOKS like water droplets, falls away as ice (leaving some streaks perhaps?).
     
  13. Mar 21, 2010 #12
    Good theories. However when I took the bottle out of the freezer it was completely clear and sloshed in the bottle as I took it out like a liquid. Then crystallized within a few seconds right before my eyes.

    The dew on my windshield looked to be liquid from outside my car, being smooth and shiny and completely clear, then instantly crystallized and became opaque as soon as the wipers began to move.

    Can water be cooled to the edge of freezing and still remain liquid until some kinetic energy stimulates the crystallization?
     
  14. Mar 21, 2010 #13

    DaveC426913

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    Yup. Not uncommon. It's called supercooling.

    Freezing requires more than simply cold temperatures. It requires nucleation sites as well. If there are no nucleation sites for the water to begin crystalizing at, then, in some cases the water simply does not crystalize, even as the temp drops well below freezing. The water is supercooled and unstable. Give it a shake and the whole thing'll freeze rapidily.
     
  15. Mar 21, 2010 #14
    Excellent! Thank You!

    So that could explain the video.

    But I still do not see the relevance of the straw and fire.
     
  16. Mar 21, 2010 #15
    Excellent! Thank You!

    So that could explain the video.

    But I still do not see the relevance of the straw and fire.
     
  17. Mar 21, 2010 #16
    There is no relevance. Like superheating of water, the issue is the water falling below freezing (or past boiling) without nucleation sites for bubbles or crystals to form. You must live in a very cold place, or have a VERY powerful freezer.

    Whether I'm right, or DaveC is, the Straw and Fire = "Abracadabra" for this "trick".

    It does NOT explain the video either, which as has been established, is clearly doctored.
     
  18. Mar 21, 2010 #17

    DaveC426913

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    Yes, as FD points out: the video is not real. It's done with time-lapse. The straw and fire are bait & switch.
     
  19. Mar 21, 2010 #18
    Put a beer in the freezer being sure not to disturb it.
    Pull it out the next day, and hit another bottle on top of the super cooled one. Insta frozen beer.
     
  20. Mar 21, 2010 #19
    NOTE: This can be dangerous...
     
  21. Apr 17, 2010 #20
    lol

    The message is not too short, damn you.
     
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