Fire Definition and 300 Threads

I have searched for the answer of this question for a long time... but did not get a satisfactory answer. what is fire? what is it made of?

I just saw an article on TV about this new material by 3M called Novec 1230 (or Sapphire by Ansul) that looks and acts much like water, but isn't. It's non-conducting and non-destructive. I was wondering what this material would be like to handle. I wondered how hard it would be to tell that...

Not some blogger, but Blogger, Google's blog site. For two days the Live Bookmarks of a couple of blogs that I follow (one being PF's very own string theorist-in-the-making, Dimitri Terryn) weren't loading (and they still don't!), and I wasn't able to access the site as well. Today, while...

It started out very slow, and then end in a fury of outstanding pictures. So again, congratulations to everyone who participated. This is going to turn out to be another difficult contest to pick. 1. ZapperZ http://img351.imageshack.us/img351/7945/img38639zy.jpg 2. Moonbear...

[SIZE="5"]Fire In The Sky With the US Independence Day coming up on the 4th of July, what more appropriate theme to have right now than... FIREWORKS! All your pictures must feature fireworks. It does not, however, include unexploded fireworks (i.e. pictures of fireworks in a package in...

Really looked scary on TV. http://news.bbc.co.uk/2/hi/europe/5012706.stm

I can why fire would give off gasses. In particular if one is burning CH4 there would be a lot of gaseous CO2 and H2O. Why, when I burn wood, does a fine particulate matter get kicked up into the air? Why does it not fall to the ground like ordinary solid matter? Is there a lot of frictional...

Last night, something exploded inside my monitor. It generated some smoke which I could smell. I pulled the plug as fast a possible, but after a some time past I got curious and plugged the monitor back in and turned it on. To my suprise, the only problem was that the image was shifted to the...

What colour is fire if your burning whatever in a room that is pure O2. rather then in normal air at a campfire which has a lot of other chemicals; like nitrogen. and does it follow that one experiment where say hydrogen burns as only 1 frequency of the spectrum

I grew up with a fireplace so it's second nature to me, but I once had a girlfriend who told me that, while house sitting, she tried and tried to no avail to get a fire going in the fireplace, and ended up not able to do it, losing the hoped for opportunity of curling up by the fire with a good...

Which is the best way to put out the fire created by the leakage of ammonia? Thank you. :biggrin:

More like, trial by cool as hell movie because this movie was so cool It was the greatest movie ever[/size]to be aired on CBS[/size] Did anyone else see it? Man if you were dumb enough to think "oh man this movie sucks" before the ending, you missed tremendous amounts of concentrated...

A cannon, located 60.0 m from the base of a vertical 25.0m-tall cliff, shoots a 15-kg shell at 43 degrees above the horizontal toward the cliff. I have determined: v=47.75 m/s v_0x= 34.92 m/s v_oy=32.56 m/s a_x=0 a_y=-9.8 m/s^2 x_o=0 y_o=0 x=60m y=25m alpha= 43 degrees part a...

Is fire alive? strange question I know. But here are some points that show to me fire could well be alive... Fire breaths, it can take in oxigen and breaths out carbon dioxide Fire eats, just like we need fuel to live fire needs fuels to live Fire dies, lack of oxygen, food, causes the...

There was a fire upstairs and the sprinklers went off. FD was here pronto and got them shut off and all the water squeegeed out of that apartment. I had some leakage but mostly water stains on drywall seams, around light fixtures, and ac vents. The abatement (?) guy has cut holes the size of...

when u have a fire on a candle, and u blow the fire out, where does it go? does it evaporate into thin air? or does it just disappear? can fire really evaporate? i been wondering about this question ever since my math/science teacher brought it up

does anyone have any knowledge on fire modelling?

Are there any topics in physics that concerns fire? I need it for some essay.

A one bar electric fire has a power rating of 1000W (1kW). If the RMS voltage of the mains is 240V, find the RMS value of the current flowing in the fire and the peak values of current and voltage? Can some one please help me??..Its a past exam question and i don't even know how to start...

What is it ? Why does it have colors ? Thanks

What is fire?

Consider a high pressure gas cylinder of methane which exhibits a pressure of 200 atmosphers (absolute) at a temp. of 0*C in a small storage building. the building catches fire whcih causes the temp of the cylinder to rise to 1200*C. What would the pressure in the cylinder be then? express your...

I'm doing calculations for how much water was lost during flushing a hydrant. It is a 2.5 in. outlet and the pressure is on the system in that zone is 40 psi. It was flushing for 1.5 hours. Q=AV V=[(2 dP gc)/density] density = 62.4 lb/ft^3 dP=40 psi gc=32.2 lbm ft / lbf s^2...

Three fire hoses are connected to a fire hydrant. Each hose has a radius of 0.020 m. Water enters the hydrant through an underground pipe of radius 0.080 m. In this pipe the water has a speed of 3.0 m/s. (a) How many kilograms of water are poured onto a fire in one hour? (b) Find the water speed...

What is fire? I learned once upon a time that it's plasma, but that doesn't really get me anywhere... why is it colored/shaped the way it is/etc etc etc? :bugeye: thanx folks!

Okay, so I'm standing in the store minding my own business when I see a keychain that is really a Magnesium fire starter. Hey I thought that's cool, I think I'll buy that. so I shelled out the eight bucks and brought it home. The instructions on the back say that you are supposed to use a knife...

could someone explain fire on the atomic level? in six easy pieces it says heat is usually in the form of molecular motion but sometimes it can be so enormous that it generates light. but how? can the motion of these molecules form other types of electromagnetic radiation (secondary question)?

How does water extinguish fire? My 5-year-old brother asked me, and now I'm really curious.

Few weeks ago there was that huge fire in a high rise tower in Caracas/Venezuela,does that building collapsed?

hello, i am a homeschool mom with three inquisitive children. they would love to know why fire is hot...if anyone can answer this question i would appreciate it. i realize that this may be difficult to put in laymans terms, but any information would be helpful... thanks :) ~mbinnc :confused:

I've got a project for school where we have to pick one invention/discovery and prove that it is the best invention/discovery in the history of mankind. One of the requirements is to show how it will continue to be the best discovery in the future. I've done a bit of searching and brainstorming...

http://www.Newton.dep.anl.gov/york/labshots/other/burner2.jpg This thing invokes so much terror in me. I really need help overcoming that fear because I will be having my Practical Exams in around 8 weeks. The Chemistry and Biology (sometimes Physics) practicals require that you light a...

Is heat always the factor that determines the colour of a flame? Is there a way of approximating the variations in colour that would occur within flames from a wood fire?

Anyone here knows what Greek fire is all about? I understand it was used in the 8th century, and the recipe was lost. Projectiles would ignite ships on impact, and water wouldn't turn it off, in fact, it would burn on water. They could also make flamethrowers with it. Is there an equivalent...

What type of particles is fire made up of?

Is fire considered more energy then element? Never took much chemistry courses in school/college, however I have always wondered what fire is.

Why doesn't kerosene oil catch fire when it is in bottle?

Newest Science issue: http://www.sciencemag.org/cgi/content/full/304/5671/663a Science, Vol 304, Issue 5671, 663-665 , 30 April 2004 BTW, the Hippo was common as north as the UK in certain times so it might not have been always that cold in Europe. What interests me is why -after...

Fire always points up. My thoughts are, the hot air it creates travels upwards, and with that, so do the firing photons within the atoms of the air, which would then create the image of the fire traveling upwards. Am i right?

Your finger appears to be 'buring' because you touched something hot. This is a different from something actually burning. First off, don't assume my level of physics knowledge. Being able to explain something in terms of smaller objects does not imply that our knowledge of that...

Anyone?

Were you guys and gals aware that WMDs in Iraq are no longer being sought with the fervor displayed at the start. Here is an article that gives one the feeling that this is so. http://www.sptimes.com/2004/01/11/Columns/Bush_s_deception_on_I.shtml

Can someone please tell me what the relationships are between, heat, pressure, light and electricity? Why a magnet spinning around wire produce electricity...why does does a nail wrapped in a wire, which has electricity moving through it, transform the nail into a magnet? What is fire and why...

It is 8:30 in the morning here in San Diego but the cloud of smoke over the whole city is so thick you can't see the sun. There is an eerie, sidelight to everything coming from a clear band of sky in the southeast. It was much brighter out two hours ago at 6:30 AM. An hour ago the sun was still...

http://www.sabcnews.com/south_africa/general/0,2172,67329,00.html

http://www.kansas.com/mld/eagle/news/local/5236426.htm

This may be a stuppid question. I don't really care though. I really am haveing hard time understanding what fire is? The flame of light. There are certain things I know, like it needs fuel and oxygen and heat to start. Once it is started it will just live on its own until something runs out...

A person jumps from a fourth story window 15 m above a safety net. THe jumper stretches the net 1.0 m before coming to rest. What was the deceleration experienced by the jumper? Equation: x = x0 + v0t +.5at^2 15 m = 1 m + 8.6 m/s(2s) + .5(a)(1.75s^2) 15m = 1 m + 17.2 m/s^2 +...

Now, just so you know, all aircraft allied with the USA are sending out an IFF signal which a radar operator can not miss unless he/she is not paying any attention at all.

First let's work our way up. 1. For a fire to start, oxygen has to be present, yes? 2. There is no oxygen in space(vacuum), yes? Since they are surrounded by vacuum, they have absolutely no way to obtain the oxygen to support combustion. Then how is it that the Sun and stars can burn...