Downhill Rotation Race

Submitted by: kitteh9lives 5 years ago in Science

Which will roll downhill faster, a water filled bottle or an ice filled bottle? Give your best nerd guess.
There are 26 comments:
Male 192
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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Male 868
Apparently ice does unless the water has extra air in the bottle. More exciting nerd info if you vote and follow it on youtube..
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Female 182
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?
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Male 89
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.
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Male 6,694
Water.
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Male 2,521
"Something`s fishy...he`s got a southern accent, but he`s smart."

Do I presume you`ve never heard of Samual Clemens?
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Male 792
Something`s fishy...he`s got a southern accent, but he`s smart.
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Male 383
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.
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Male 52
I mean air
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Male 52
@Mrbear if the ice is frozen solid, the air isn`t going anywhere if they add ice to the system.
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Female 136
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?
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Male 2,199
i turned it off as soon as i realized they were trying to trick me into learning...
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Male 798
Water because it will continue to push it along.
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Male 10,440
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.
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Male 25,416
Yay, learning is fun. Throwing dodgeballs at people is fun to. WIN!
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Female 3,598
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 :-)
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Male 300
I went with water thinking the liquid being more dense than ice would have greater inertia. Did not think of rotational flows.
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Male 4,807
I done just got smrter I did.
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Male 1,451
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.
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Male 2,988
that was pretty cool. maybe its because i`m an engineer and understand what they are talking about though...
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Male 2
well i just lost 5 minutes of my life ill never get back
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Male 1,678
Aye, the bottle burst "by accident".
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Male 776
"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.
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Male 3,285
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.
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Male 191
In school we were told that the ice floats on water because its density is lower then water, my guess here is water.
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Female 8,044
Link: Downhill Rotation Race [Rate Link] - Which will roll downhill faster, a water filled bottle or an ice filled bottle? Give your best nerd guess.
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