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Coaster
Baʿal



Registered: 05/22/06
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Why does fire always go in the opposite direction of gravity?
#11451134 - 11/13/09 10:23 PM (14 years, 6 months ago) |
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or is it just that the plasma is lighter than air?
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DieCommie

Registered: 12/11/03
Posts: 29,258
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Re: Why does fire always go in the opposite direction of gravity? [Re: Coaster]
#11451144 - 11/13/09 10:25 PM (14 years, 6 months ago) |
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Hot air rises.
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frith
God

Registered: 10/27/09
Posts: 7,512
Loc: Philadelphia, PA
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Re: Why does fire always go in the opposite direction of gravity? [Re: DieCommie]
#11451164 - 11/13/09 10:28 PM (14 years, 6 months ago) |
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Quote:
DieCommie said: Hot air rises.
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audiophoenix
Find Peace



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Re: Why does fire always go in the opposite direction of gravity? [Re: Coaster]
#11451204 - 11/13/09 10:33 PM (14 years, 6 months ago) |
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Quote:
DieCommie said: Hot air rises.

Quote:
Coaster said: or is it just that the plasma is lighter than air?
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Coaster
Baʿal



Registered: 05/22/06
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Re: Why does fire always go in the opposite direction of gravity? [Re: audiophoenix]
#11451216 - 11/13/09 10:35 PM (14 years, 6 months ago) |
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lol wut why was that stupid is plasma heavier or something or depends on the plasma i dunno much about plasma
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audiophoenix
Find Peace



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Re: Why does fire always go in the opposite direction of gravity? [Re: Coaster]
#11451234 - 11/13/09 10:38 PM (14 years, 6 months ago) |
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Has to do with the density of molecules. Molecules expand when they heat up making them less dense than the air around them so they rise. The "plasma" rides with the airflow.
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DieCommie

Registered: 12/11/03
Posts: 29,258
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Re: Why does fire always go in the opposite direction of gravity? [Re: Coaster]
#11451242 - 11/13/09 10:40 PM (14 years, 6 months ago) |
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Plasma is just highly ionized atoms. It can be light, or heavy depending on different shit.
http://www-spof.gsfc.nasa.gov/Education/FAQs7.html#q97
Look here ^^ for the question "Is fire a plasma"
Edited by DieCommie (11/13/09 10:47 PM)
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Enphenitie
Psychonaut in Training


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Re: Why does fire always go in the opposite direction of gravity? [Re: audiophoenix]
#11452726 - 11/14/09 09:18 AM (14 years, 6 months ago) |
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Quote:
audiophoenix said: Has to do with the density of molecules. Molecules expand when they heat up making them less dense than the air around them so they rise. The "plasma" rides with the airflow.
Nay the molecules do not expand, rather the atoms move faster, creating more collisions, so to reach equilibrium they move to a space of less density.
At least that's how I remember it. It's really the same concept. This whole post is unnecessary... but I believe I'll post it anyways.
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ToTheSummit
peregrinus



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Re: Why does fire always go in the opposite direction of gravity? [Re: Enphenitie]
#11459058 - 11/15/09 10:17 AM (14 years, 6 months ago) |
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I'll bet these guys could tell you a little about gravitys effect (or lack thereof) on fire. 
At 0:20 theres some cool video of a match burning.
-------------------- You invented the wheel....You push the motherfucker!!
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mellowparty
legitimate researcher


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Re: Why does fire always go in the opposite direction of gravity? [Re: ToTheSummit]
#11459980 - 11/15/09 01:26 PM (14 years, 6 months ago) |
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How would a log burn in zero gravity?
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Shroomism
Space Travellin


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Re: Why does fire always go in the opposite direction of gravity? [Re: mellowparty]
#11460186 - 11/15/09 01:59 PM (14 years, 6 months ago) |
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with or without oxygen?
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mellowparty
legitimate researcher


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Re: Why does fire always go in the opposite direction of gravity? [Re: Shroomism]
#11460297 - 11/15/09 02:14 PM (14 years, 6 months ago) |
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Quote:
Shroomism said: with or without oxygen?
Without of course
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Shroomism
Space Travellin


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Re: Why does fire always go in the opposite direction of gravity? [Re: mellowparty]
#11460383 - 11/15/09 02:29 PM (14 years, 6 months ago) |
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it wouldn't?
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mellowparty
legitimate researcher


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Re: Why does fire always go in the opposite direction of gravity? [Re: Shroomism]
#11460642 - 11/15/09 03:08 PM (14 years, 6 months ago) |
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Okay, now seriously! What would a flaming object resemble in zero gravity? A sphere maybe?
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ChuangTzu
starvingphysicist




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Re: Why does fire always go in the opposite direction of gravity? [Re: mellowparty]
#11460725 - 11/15/09 03:19 PM (14 years, 6 months ago) |
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Probably something like this:
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jimbotron
Patty-Cake Enthusiast



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Re: Why does fire always go in the opposite direction of gravity? [Re: ChuangTzu]
#11463564 - 11/15/09 09:16 PM (14 years, 6 months ago) |
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Yep the gas would expand in all directions. Pedantically I will point out that it wouldn't be a perfect sphere just as the earth is not spherical, but you've got the idea.
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ToTheSummit
peregrinus



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Re: Why does fire always go in the opposite direction of gravity? [Re: mellowparty]
#11468190 - 11/16/09 04:18 PM (14 years, 6 months ago) |
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Quote:
mellowparty said: Okay, now seriously! What would a flaming object resemble in zero gravity?
Did you watch the video I posted? At 0:20 theres a match burning in zero G (on the Mir Space Station).
-------------------- You invented the wheel....You push the motherfucker!!
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mellowparty
legitimate researcher


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Re: Why does fire always go in the opposite direction of gravity? [Re: ToTheSummit]
#11468240 - 11/16/09 04:27 PM (14 years, 6 months ago) |
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No, but I did now. I wish I was in space lighting up match stix all day long
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Glenners
Rhymenosaurus


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Re: Why does fire always go in the opposite direction of gravity? [Re: mellowparty]
#11469751 - 11/16/09 08:19 PM (14 years, 6 months ago) |
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Farfignewton
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Re: Why does fire always go in the opposite direction of gravity? [Re: Glenners]
#11526495 - 11/25/09 01:57 PM (14 years, 5 months ago) |
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Fire is a rapid self sustaining oxidation process accompanied by the evolution of light and heat in various intensities; in order for a fire to occur there needs to be all four qualities of the fire tetrahedron present: Fuel, Chemical Chain Reaction, Oxidizer, and Energy, and if for any reason one is completely removed or isn't sufficient to sustain the burn, the fire will be extinguished. Fire is not matter at all, like other elements such as water, air, and earth, but it is instead a visible tangible side effect of matter changing for. The chemical chain reaction when gases react with oxygen in the atmosphere is: CH20+02>H2)+C02+CO+C+N2, and the chemical chain reaction of fire is self-perpetuating, heating any potential fuel around it ( even oxygen ), and when the flame ignites gases, the fire continues to spread. Earth's gravity determines how the flame burns. Hot gases in the flame are much hotter and less dense than the surround hair so they move upward toward lower pressure, which is why fire typically moves upward, and why they're ''pointed'' at the top. However if you were to light a fire in microgravity-environmental conditions, it would form a sphere. Hope that helped clear up any questions.
-------------------- "Sparkling Green Tea Ginger Ale is twelve fluid ounces of wet-dreams in a can!"
Edited by Farfignewton (11/25/09 07:29 PM)
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