2006-07-18 14:48:02 · 9 answers · asked by Anonymous in Environment
I need to know ASAP please!
2006-07-18 14:51:53 · update #1
A flame front in a gas travels at about the speed of sound. Sound travels at the average speed of the air molecules (760 mph but vaires with temperature and pressure). So does a flame front, energetic molecules from one reaction travel on and impact another species with enough kinetic, thermal and chemical energy to initiate another reaction.
Mixtures closest to stiochemetric ratios will propogate flames the fastest. But flammable gases have a range of concentrations over which they will explode.
If you are asking about wildfires - it varies with fuel type (grass is fast), fuel moisture content, and especially wind speed). From a crawl (0.5 mph or less) to faster than you can run (20 mph or more).
2006-07-18 18:33:44 · answer #1 · answered by David in Kenai 6 · 0⤊ 0⤋
If you search on wildfires in the news, you will find that they can travel faster than a man can run away from them. Basically, they pre-heat the nearby things so much that they are almost ready to burst into flames by the time the actual fire gets there. The flames can travel as fast as the wind generated by the heated air of the flames rising. They sort of become self-sustaining, as long as there is fuel nearby. That's what makes them so dangerous.
2006-07-18 15:09:13 · answer #2 · answered by cdf-rom 7 · 0⤊ 0⤋
Assuming your talking about wildfire, it will generally travel with the wind - and at about the same speed.
Fire will also travel uphill very fast and can be spread downhill by rolling debris.
However, fire must have fuel to burn. If you are concerned about your home, keep shrubs and other tall vegetation far away from the house and the grass well-watered. It also helps to wet down the roof when the fire is nearby.
2006-07-19 12:15:50 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Hi... it all depends upon the velocity of wind and the percentage of oxygen present at the sight of fire. We cannot give an ideal speed of fire.
2006-07-18 18:21:12 · answer #4 · answered by vinay 1 · 0⤊ 0⤋
Fire will travel to whereever oxygen is present. That is why you shouldnt open a closed room with a fire in it.
2006-07-18 15:41:30 · answer #5 · answered by adrianchemistry 2 · 0⤊ 0⤋
Depends on what is burning and what is in the way. In ideal conditions, it can travel very, very fast.
2006-07-18 14:51:41 · answer #6 · answered by Anonymous · 0⤊ 0⤋
That depends upon how fast you are driving.
2006-07-18 16:14:04 · answer #7 · answered by Engineer 6 · 0⤊ 0⤋
depends on its fuel and atmospheric conditions
2006-07-18 17:05:08 · answer #8 · answered by CLBH 3 · 0⤊ 0⤋
one gazillion mL/sec
2006-07-18 15:41:48 · answer #9 · answered by shimmerfizzelpeachfuzzy 2 · 0⤊ 1⤋