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Category: Science
Date: 07/04/11 11:00 AM

26 Responses to Downhill Rotation Race

  1. Profile photo of kitteh9lives
    kitteh9lives Female 70 & Over
    8033 posts
    July 4, 2011 at 9:45 am
    Link: Downhill Rotation Race - Which will roll downhill faster, a water filled bottle or an ice filled bottle? Give your best nerd guess.
  2. Profile photo of Adi_Noor
    Adi_Noor Male 18-29
    191 posts
    July 4, 2011 at 11:09 am
    In school we were told that the ice floats on water because its density is lower then water, my guess here is water.
  3. Profile photo of tedgp
    tedgp Male 30-39
    3287 posts
    July 4, 2011 at 11:12 am
    Ok. So they put out a vid trying to be clever, say both options are wrong , then say, well, you might be right. we just dont know because we`re stupid as poo and just want ppl to sub to our youtube so we can be efamous.
  4. Profile photo of addler
    addler Male 13-17
    778 posts
    July 4, 2011 at 11:27 am
    "Ok. So they put out a vid trying to be clever, say both options are wrong , then say, well, you might be right. we just dont know because we`re stupid as poo and just want ppl to sub to our youtube so we can be efamous."

    They put a video that explains why ice happened to be faster when really water should have won the race.

    You must have missed their explanation because you`re a dumbpoo.
  5. Profile photo of paddy215
    paddy215 Male 18-29
    1677 posts
    July 4, 2011 at 11:35 am
    Aye, the bottle burst "by accident".
  6. Profile photo of kdubbla
    kdubbla Male 18-29
    2 posts
    July 4, 2011 at 12:01 pm
    well i just lost 5 minutes of my life ill never get back
  7. Profile photo of CoyoteKing
    CoyoteKing Male 18-29
    2988 posts
    July 4, 2011 at 12:49 pm
    that was pretty cool. maybe its because i`m an engineer and understand what they are talking about though...
  8. Profile photo of Spider_sol
    Spider_sol Male 18-29
    1452 posts
    July 4, 2011 at 1:17 pm
    Well, I was really right. I actually knew the water/air idea but didn`t know the terminology behind it. I knew 100% liquid would`ve been fastest because the liquid wouldn`t have to rotate (but wouldn`t be hindered if some of it, the part near the center and outer edges, `wanted` to).

    He should keep doing the mixture because now making the liquid bottle less and less water will slowly get faster.
  9. Profile photo of a1butcher
    a1butcher Male 40-49
    4812 posts
    July 4, 2011 at 1:22 pm
    I done just got smrter I did.
  10. Profile photo of splat13
    splat13 Male 30-39
    301 posts
    July 4, 2011 at 2:13 pm
    I went with water thinking the liquid being more dense than ice would have greater inertia. Did not think of rotational flows.
  11. Profile photo of SmilinSam
    SmilinSam Female 18-29
    3599 posts
    July 4, 2011 at 3:03 pm
    interesting, this is the same reason i always break the seals on my ice tea before i shake them up, to get that turbulent flow and mix up all the good stuff at the bottom :-)
  12. Profile photo of Fatninja01
    Fatninja01 Male 30-39
    25408 posts
    July 4, 2011 at 3:09 pm
    Yay, learning is fun. Throwing dodgeballs at people is fun to. WIN!
  13. Profile photo of LazyMe484
    LazyMe484 Male 18-29
    10443 posts
    July 4, 2011 at 3:34 pm
    I guessed ice, but I assumed that the water filled one wouldn`t be totally full of water.

    Still... just a tiny amount of air will do all that. That`s cool. Thanks.
  14. Profile photo of Lolboy
    Lolboy Male 70 & Over
    798 posts
    July 4, 2011 at 5:12 pm
    Water because it will continue to push it along.
  15. Profile photo of Mantistador
    Mantistador Male 18-29
    2200 posts
    July 4, 2011 at 9:29 pm
    i turned it off as soon as i realized they were trying to trick me into learning...
  16. Profile photo of mrbear10
    mrbear10 Female 13-17
    136 posts
    July 4, 2011 at 11:11 pm
    wait, adding air into the one with a liquid and not the one with a solid in it create another varieble, right? So if thats the case how can we be sure of what really is the winner and what caused it if there are 2 things that are different?
  17. Profile photo of Exhumed
    Exhumed Male 18-29
    52 posts
    July 4, 2011 at 11:20 pm
    @Mrbear if the ice is frozen solid, the air isn`t going anywhere if they add ice to the system.
  18. Profile photo of Exhumed
    Exhumed Male 18-29
    52 posts
    July 4, 2011 at 11:21 pm
    I mean air
  19. Profile photo of scottthebum
    scottthebum Male 18-29
    383 posts
    July 5, 2011 at 12:33 am
    Yes, it should be water that wins (with no air contaminating the bottle) because H20 has a unique characteristic that unlike most other substances in its solid form its molecules space futher apart from each other to make ice less dense than water. So because in equal volumes water should be more dense, the water should win here.
  20. Profile photo of Samsquanch
    Samsquanch Male 30-39
    792 posts
    July 5, 2011 at 3:27 am
    Something`s fishy...he`s got a southern accent, but he`s smart.
  21. Profile photo of RobSwindol
    RobSwindol Male 30-39
    2508 posts
    July 5, 2011 at 4:52 am
    "Something`s fishy...he`s got a southern accent, but he`s smart."

    Do I presume you`ve never heard of Samual Clemens?
  22. Profile photo of meepmaker
    meepmaker Male 30-39
    6694 posts
    July 5, 2011 at 8:36 am
    Water.
  23. Profile photo of the-x-ray
    the-x-ray Male 30-39
    89 posts
    July 5, 2011 at 11:48 am
    oh man.. it`s just normal that a sealed bottle goes faster than one with a hole with air in it, because the one with air in it it will move it`s weight back and forth and is not as straight then, that`s all it`s about.
  24. Profile photo of CitrusCircus
    CitrusCircus Female 13-17
    182 posts
    July 5, 2011 at 3:36 pm
    I guessed water. Forgive my ignorance, but doesn`t there have to be a right answer unless they both roll at the same speed? Also doesn`t adding air into the liquid filled bottle make the experiment void?
  25. Profile photo of rogue_knight
    rogue_knight Male 40-49
    868 posts
    July 6, 2011 at 10:58 am
    Apparently ice does unless the water has extra air in the bottle. More exciting nerd info if you vote and follow it on youtube..
  26. Profile photo of gibb0
    gibb0 Male 13-17
    192 posts
    July 7, 2011 at 5:46 pm
    Water IS correct, if Mr video maker doesn`t start changing his experiment half way -_-
    And it makes sense, that if the water is moving as a whole because there is no air, it will move faster than if the water is also flowing around the bottle at the same time.
    Builds more momentum or something? I haven`t got a clue but that feels right to me...

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