Fire Definition and 306 Threads

What is the state of fire ? is it gas , solid or liquid ??

I was told by my teacher that fire is plasma and that plasma can be controlled by magnets. Does that mean it is possible to effectively use magnets to control fire?

I thought it might've been some kind of Ionized gas, hense the light and heat comming from it, but I'm not too sure http://www.youtube.com/watch?v=_2LpCdhuOyQ"

In many fantasy books and movies, like Harry Potter for example, there are wizards or priest who perform "fire magic" by throwing various powders into a fire cauldron. The effect is a poof of smoke or a flash. I guess the intent is to evoke some spirit or something. My question is what agents...

Has anyone else seen this on facebook? You can become a fan of "not being on fire". At first I thought it was stupid but the page is actually very funny in a morbid way. I sure am going to enjoy another day of not being on fire!

Please every1 put your 2 cents in. I joined this forum as a few of my buddys are arguing about compressed air. here is the situation. We have a car with a air compressor (not an oxygen tank) in the trunk the car is rear ended and catches on fire, during the accident the tank was broken open...

Hello again, Here to ask a few more questions. I previously asked a question about light and weather or not it could possibly have different speeds. But I recently realized that the burning of different chemicals can have different tones of light. I would like to know how exactly we first...

how water extinguishes fire? i mean..what is the chemical reaction taking place when water combines with fire??

While having a discussion with a friend the idea of fire being the fourth state of matter came up, in other words, a hot enough fire or "flame" can be considered plasma being the fourth state of matter. My response to this was, "No, fire or a "flame" is always in the gas phase, fire is the rapid...

Is fire a lifeform? Fire moves, grows, consumes, needs oxygen, gives off waste and can "die".

Homework Statement Hearing the siren of an approaching fire truck, you pull over to the side of the road and stop. As the truck approaches, you hear a tone of 470 Hz; as the truck recedes, you hear a tone of 400 Hz. How much time will it take the truck to get to the fire 2.5 km away assuming...

http://en.wikipedia.org/wiki/Great_Beijing_Mandarin_Oriental_Hotel_fire_of_February,_2009 Can anyone explain to me why didn't this building collapse on itself after burning for 5 hours? I thought the steel would have weakened enough to allow some kind of total or partial collapse. This...

hello can someone tell me are ambient IR and IR in candle fire has different wave lengths? I'm trying to make a flame detector,so if there is different wave lengths i can use a filter circuit to filter only fire's IR signal. Thanks

Cannon Fire! Can anyone please help me figre this one out; A senior physics class conducting a research project on projectile motion constructs a device that can launch a cricket ball. The launching device is designed so that the ball can be launced at ground level with an initial velocity...

I came into work this morning and someone had started to plug their monitor into their laptop via VGA port and it caught fire for a moment, burnt the metal a bit and the internals. A vga cable is only 5v and 5ma, how is this possible? The laptop was running only off the battery which still had...

Firemen are shooting a stream of water at a burning building using a high-pressure hose that shoots out the water with a speed of 25.0 {\rm m/s} as it leaves the end of the hose. Once it leaves the hose, the water moves in projectile motion. The firemen adjust the angle of elevation \alpha of...

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I'm on fire! Photos featuring bonfires, fireplaces, candles... as long as something's burning, your photo is in. Contest Rules: 1. Any digital photo or digitally-scanned photo relevant to the theme will be accepted within the contest period. In case there's a gray area, or you're not sure...

Hi all, Apologies if this is in the wrong location, I'm new (and using that as an excuse :) ) i am currently working on a fantasy novel and having some issues that my days old knowledge of thermodynamics, and what-not, is nowhere near capable of managing. So, to dive straight in; if we...

I am trying to calculate the effects of a Jet fire from a pipe rupture where the pipe contains flammable gas. I have come across a model by D.A. Carter which predicts the heat flux at a distance x from the fire. The problem that I have is that I want to also calculate the length of the flame and...

Certainly I don't think she is qualified or equipped to lead the Nation, but neither do I think - should it be shown to be to an attack against her - that such a thing has any place in the public colloquy. https://www.youtube.com/watch?v=PRVx1g_BeF4

Homework Statement An approaching tank fires at you and you hear the sound 3 seconds after the muzzle flash. Ten seconds later the same tank fires again and you hear the sound 2 seconds after the flash. The temperature is 100 degrees Celsius. How fast is the tank going? How long until he...

1. Small rockets are sued to make small adjustments in the speed of satellites. One such rocket has a thrust of 59N. If it is fired to change the velocity of a(n) 74000kg spacecraft by 54cm/s, howl ong should it be fired? Answer in units of s. 2. F=deltaP, delta t; F=mVf-mVi...

Whilst perusing the Tube, I found this: What do you think? Did he actually light water on fire? I don't think so.

Hi. So my friend thinks he's smart, and one time, while we were talking, he asked me whether fire can produce shadow. Of course he does not know the answer, but knowing him, he asked me this question to show that I am not smarter than him. Nevertheless, his question started bothering me, because...

Yes, that's rhetorical, we all know I can't be wrong. I was just watching Anthony Bourdain on tv and they were discussing a Japanese knife maker. They said that the knife maker used a traditional charcoal fire in making the blade because he could control the heat better than with a gas...

A fire hose sprays 450 liters of water a minute onto a fire with a velocity of 17.0 m/s. Water has a density of 1 kg/liter. What is the average force acting on the fireman holding the hose due to the water? Is it just: F=pt F=450*17.0*60 F=459000N The force seems kind of big?

Why does water put fire (not oil fire) out? I understand that the bound Oxygen atoms in the H2O molecules can't be used by the fire but doesn't water contain free oxygen impurities; If not, how do fish breathe? Is it just because the amount of oxygen contained in the impurities is insignificant...

Hi. What happends when i put fire to wood that I have in a chamber with a pressure of about 15 kg/cm2 = 14.710 Bar = 213,3 Psi. Will it burn as usuall or much faster? Will I get a very high pressure? How High pressure can I get? Magi

How can one approximate the distance that one would have to move two sticks in order to start a fire at room temperature. With a given coefficient of friction and mass for the wood as well as the amount of force that someone can apply to the wood and the flashpoint of the wood. Attempt W =...

Hey everybody. I heard a physics professor at Berkeley say that normal fire (from a lighter) is plasma. My science teacher at high school says that it isn't. So my question is, is normal fire in state of plasma or not? Thanks.

If you are standing atop a 2 story building and fire a bullet vertically towards the ground and drop one from the same height will they arrive at the same time? I am not a physics person but my girlfriend is in it now and tells me that they would arrive at the same time. I don't see this to be...

http://www.theglobeandmail.com/servlet/story/RTGAM.20071027.wfemafake1027/BNStory/International/?page=rss&id=RTGAM.20071027.wfemafake1027 This is a new low! :smile: I'm still surprised Chertoff is going to do anything about it.

Ahh, my little fire incident! Quick intro, first post, but I didn't register just to post this, I registered yesterday. Decided to just start reading through and finding some tutorials. I have an interest in electronics engineering. FIRE! ... Small fire, just a little bit on top of the...

Hi I need help with a question in a Fire Safety course I'm studying for. The question reads : Define the following terms and indicate the units in which they are normally expressed. State how low numerical values for these properties would affect the ease with which solid materials can...

hello! i am designing a firetube boiler for my design project. could u suggest me some website where i could get interesting and relevant literature review on fire tube boiler. Thanking u in advance

Homework Statement A fire hose held near the ground shoots water at a speed of 6.8 m/s. At what angle(s) should the nozzle point in order that the water land 2.0 m away? Why are there two different angles? The Attempt at a Solution First, I don't know why there would be two angles. I only...

A fire hose held near the ground shoots water at a speed of 7.8 m/s. At what angles should the nozzle point in order that the water land 2.0 m away I don't even know where to start. Can anyone set me in the right direction?

Business invest time to attract customers, but some customers are simply not worth having. So some business think that they should fire the customers they lose money on. -Is it acceptable to fire customers who cost you money on an ethics point of view? -Is it acceptable for the company to...

Hello, We have an installation in which we will be placing a 1/4" thick mirror which spans 7ft across and 5ft in height directly next to a "line of fire" (a gas pipe with holes which will have a flame approximately 6" in height). Our concern is that when the line of fire is turned on in...

I can't hear him properly and if someone can explain it to me that would be great. I have taken grade 12 physics. Thanks.

Carbon dating! A 5g charcoal sample from an ancient fire pit has a 14C activity of 63 disintegrations per minute. A living tree has a 14C activity of 15 disintegrations per minute per 1g. The half-life of 14C is 5730 years. How old is the charcoal sample from the ancient fire pit...

I was recently watching an episode of The View on youtube where they were talking about 9/11 conspiracys. Rosie (I hate that woman) proceeded to tell the audience that it is impossible for fire to melt steel and therefore there were other factors involved that made the towers collapse. I want to...

If every thing is either 'solid', 'liquid' or 'gas' then what is fire? wirefree

accord. to Newton's laws, action <=> reaction, like how a balloon moves up if u blow air in it and then leave it at once...the air comes out with a force(action) and the balloon moves up(reaction)...the same principle in rocket...but with a difference...the gas actually burns...so the question...

Hello, I am a Forensic Investigator, and I am seeking help solving a case involving a possible (and probable) extension cord failure. This failure caused a fire and very large lawsuite. I need help determining the heat release potential of this extension, given the load on the end of it...

Why is fire hotter when fueled by sulfur as compared to say, paper, wood, or charcoal?

What will happen? If I took a very small amount of pure acetone, put it in a bowl and went outside to set it on fire(safety first). I am curious because I am a hiker and I am working on a lightweight alcohol stove. I don't have any alcohol that seems to work right now but I do have acetone and I...

THroughout school we learned there were 3 basic phases of matter. SOlid, liquid, and gas. THen there is fire which I haven't really tried to put into one. I'd assume it's gas or a 4th phase that came along in my high school years...plasma. It's very hot and the elctrons are still jumping from...

This was in my local paper. I had to dig a bit to come up with a link to the info. It seems to me that this should be front page news. These guys were apparently finding a bit too much waste and corruption in government agencies. According to my local paper's version of the story there has...