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Random bottle collapse?!

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Random bottle collapse?!

Unread postAuthor: zeigs spud » Mon Jan 29, 2007 8:53 pm

i had a gatorade bottle i was just spraying axe in then lighting it with a lighter and when i was done i blew on it to get fumes out, went inside and put the cap on and stuck it under m work bench.

about a week later (today) i rememberd the bottle and was gonna try and make a mini hybrid but as soon as i started to pick i up it kinda collapse in on it'self as if the air were sicked out! it wasn't a complete collapse like it was a ball afterwards but over half of the small sides of the bottle made a loud "pop" and bent inward towrds eachother.

wtf do you think happend?! it was like some kinda si-fi thing lol..
:wav: yea...lol
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Unread postAuthor: Pyro Ninja » Mon Jan 29, 2007 9:11 pm

The air inside the bottle might have been hot which would have made it expand, and when i cooled it would have decompressed.
and also heat sorter makes bottles collapse a bit
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Unread postAuthor: iknowmy3tables » Mon Jan 29, 2007 9:19 pm

the hot vapor expanded vapors cooled and condesed. My dad said that this happend to a gas tank on the back of a truck when they forgot to vent the hatches after cleaning it
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Last edited by iknowmy3tables on Tue Jan 30, 2007 2:53 pm, edited 1 time in total.

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Unread postAuthor: Insomniac » Mon Jan 29, 2007 9:49 pm

Yeah, the gas expanded and excess gas escaped before you put the cap on, then when it cooled the air couldn't get back in and it collapsed the bottle.

Get a milo tin and put a cm or so of water in the bottom, then put it on the stove with the lid SITTING on top (not popped in properly) and turn the stove on.
Then, after most of the waters boiled, let it sit until the water stops boiling, then pop the lid on. Pick it up (use tongs, the tin can collapse at this stage) and drop it in the sink under the cold water tap, and turn the water on.
After 30 seconds or so the tin will go POW! and collapse.
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I wonder how much deeper the ocean would be without sponges.
Right now I'm having amnesia and deja vu at the same time. I think I've forgotten this before.

Add me on msn!!! insomniac-55@hotmail.com
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Unread postAuthor: StealthSpud » Mon Jan 29, 2007 10:19 pm

Ha sounds very weird! Umm I agree with everything everyone else has said. Nothing much more to say. (For me)
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Unread postAuthor: joannaardway » Tue Jan 30, 2007 9:13 am

I'll explain.

When you messed around with the bottle, you heated the air inside it.
You then put the lid back on, and therefore a vacuum was created within after the air cooled.

The shape of the bottle was held in spite of this slight vacuum, due to the circular construction.
When you picked it up, you warped the sides slightly, so that the shape was no longer perfectly round, which then allowed the mild vacuum to collapse the bottle slightly.

I think that makes sense.
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Unread postAuthor: iknowmy3tables » Tue Jan 30, 2007 3:18 pm

yep, this is pretty much what probebly happened, yey we all get gold stars
you see the particles in hot stuff have more energy/heat and tend to vibrate/move randomly more, when they vibrate they need more space so they spread out expand and ocuppie more space although their is the same amount of matter, thus there is less density

so more heat = less density = same amount takes up more space
and less heat = more density = same amount takes up less space
that a little explaintion of Why in addtion to What happend, it might have been pointless but thats for the people who never learned the fundemetals of thermodynamics
:oops: whoops sorry
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Last edited by iknowmy3tables on Wed Jan 31, 2007 8:54 am, edited 1 time in total.

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Unread postAuthor: Insomniac » Tue Jan 30, 2007 4:50 pm

iknowmy3tables wrote:so more heat = more density = same amount takes up more space
and less heat = less density = same amount takes up less space
that a little explaintion of Why in addtion to What happend, it might have been pointless but thats for the people who never learned the fundemetals of thermodynamics


Errrm.....in the paragraph before this one you said more heat=less dencity (correct) and now you seemed to have changed your mind...........

More heat=LESS dencity

Less heat=MORE dencity
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I wonder how much deeper the ocean would be without sponges.
Right now I'm having amnesia and deja vu at the same time. I think I've forgotten this before.

Add me on msn!!! insomniac-55@hotmail.com
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Unread postAuthor: zeigs spud » Wed Jan 31, 2007 6:12 am

hmmmm......yea that was it lol. didn't even think about that.
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Unread postAuthor: BC Pneumatics » Wed Jan 31, 2007 8:25 am

I'm glad that everyone has taken the time to explain this, even though the person before them did a perfectly acceptable job of it...

Has anyone seen the demonstration similar to Insomniac's tin can scenario, but with a 55 gallon drum? It is a great visualization of the power of a vacuum.
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Unread postAuthor: Insomniac » Wed Jan 31, 2007 11:51 pm

No, but I bet it would be amazing. Its strange how we think vaccuums are so powerful, when a total vaccuum is only about 14 psi below atmospheric pressure.
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I wonder how much deeper the ocean would be without sponges.
Right now I'm having amnesia and deja vu at the same time. I think I've forgotten this before.

Add me on msn!!! insomniac-55@hotmail.com
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Unread postAuthor: BC Pneumatics » Thu Feb 01, 2007 8:12 am

But they are a lot harder to contain.
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Unread postAuthor: Hotwired » Thu Feb 01, 2007 9:09 am

Hah.

Makes you wonder how you'd go about leak testing a vacuum chamber.
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Unread postAuthor: BC Pneumatics » Thu Feb 01, 2007 9:26 am

Place it in a clear container with a translucent smoke.
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