How are firewalkers able to walk on coals?
467770
Basically by getting their feet wet.  Sometimes they will walk through wet grass, or step in a bucket of water first.
701662
Throw some live coals on 'em, and a pint or so of unleaded.  Stand nearby with a hose.  Make sure you do this away from things you care about.
1147489
Fire is supposed to be a plasma and/or energy. It goes up because the expanded gasses in the flame "weigh" less than cool air (like a hot air baloon). It doesnt have a shape. it adapts to the shape of the container. It looks like a drop because of the hot air "pulling" it up.
742201
Two discoveries:\n\n1.  The ability to make fire at will.\n2.  Realizing the uses of the wheel\n\nClose followups:\n\n1.  Learning to plant crops\n2.  First views through a microscope\n3.  The (most likely) meeting between homo sapians and neandertal\n4.  Wright brothers at Kitty Hawk\n\nMike Honeycutt
37480
I guess so.  They're essentially compressed coal.
490830
I think you mean burning?? as in carbonising, you partly convert the tip of a wooden arrow or spear to charcoal, this carbon is harder than the wood., too much and it shatters.
51504
if you breath you only get about 20% of the total amount of oxygen out of the air. The remaining oxygen you blow onto the coal which helps it to re-ignite for a sec.
131453
Fire needs three things fuel, oxygen, and heat.  If you put sand over a fire it cuts off its oxygen.  If you put water over fire it cuts of its heat or energy.  If you reach in and take out all the fuel it will distingusih.  I wouldn't try the last one though lol.
605161
I'm in the US Army, and they used to make us do a workout called a fire hydrant.  You get down on all fours, and then lift your leg to the outside, kinda like you are a dog peeing on a fire hydrant.  I know it sounds really weird, but after about 75-100 each leg, you will start feeling it.
641178
"Fire is the rapid combination of oxygen with fuel in the presence of heat, typically characterized by flame, a body of incandescent gas that contains and sustains the reaction and emits light and heat." \n\nLet's go through this bit by bit:\n\n(1) Rapid combination of oxygen with fuel in the presence of heat. Oxygen, fuel, and heat are the essential ingredients of fire.\n\n(2) Typically characterized by flame. The pup qualifier "typically" allows me to sidestep the issue of apparently nonflaming fires, like you get with burning charcoal. I suspect charcoal fires do create flame--you just can't see it due to the lack of impurities or incompletely burned fuel in the plume. (You can't see a fuel fire at an Indy or CART race either, because the cars run on clean-burning methanol.) But that's a matter we can leave for another day.\n\n(3) Body of incandescent gas. Flame defined. Most encyclopedia and dictionary definitions blow past this entirely, allowing persons such as yourself to imagine that fire is "pure energy" or similar nonsense. We say "body" because the gas has a characteristic structure and composition. We say "incandescent" because (a) it sounds scientific, (b) it means "luminous with intense heat," precisely what we are attempting to convey, and (c) if the Teeming Millions are going to learn one vocabulary word today, by God "incandescent" should be it.\n\n(4) Contains and sustains the reaction. Flame isn't just the result of fire; it is the fire. What's more, without the flame's heat the fire would go out.\n\n(5) Emits light and heat. Duh. However, we mustn't overlook the obvious.
41592
I am a coal Mining Engineer and a Mine Rescue team member.\n\nWhen areas of a coal mine are no longer used for mining, they are sealed by building very sturdy block walls and a sealant is applied to the blocks.  Although this seal is pretty well airtight, some gases can escape through the seal.  The strata above and below the coal seam allows methane to bleed out through small cracks that are present in the rock.\n\nWhen the barometric pressure drops, the seals will almost always "breathe" methane from them.  Generally the amount of methane that is released is not enough to reach the explosive limit (5 - 15 volume percent methane).  The ventilation that is provided by the main fan sweeps this gas away and does not allow it to accumulate to dangerous levels.  However, if a rock fall occurs or some other obstruction is present around the seal area the ventilation path can be blocked thus allowing mehtane to build up.\n\nThey are saying on the news that this explosion occured at the set of seals where the miners turned on the 2nd Left section.  Somehow methane had to have been able to accumulate around the sealed area due to a blockage or some other reason.  Something had to set the gas off such as electrical equpment or possibly someone smoking (which is highly illegal).  \n\nWhat seems funny to me is the first person that was found dead was a "mine examiner."  These people travel throughout the mine and make sure that conditions are safe to be working in.  This man definately would have had a hand held gas detection device on his body.  He probably was not phisically in the immediate area where the gas had accumulated but was close enough that he was killed by the devastating explosion.\n\nYou ask about winter months...Late fall to early spring is a particularly dangerous time in a coal mine.  Cold air that is very low in humidity is blown into the mine.  That air warms up in the mine and absorbs the humidity that is in the air, thus "drying out" everything in the mine.  This makes it easier for float coal dust suspended in the air to ignite if another explosion occurs, which is probably what contributed to the ferocity of this ignition.  Float coal dust acts just like gun powder and greatly adds to the explosive force of a methane ignition.
147861
Fires need oxygen to burn.
904481
Very interesting question that I wish I had an answer for. I was always wondering the opposite sort of speak. How did the Anglo  survive in those caves up in the mountains in the earlier days? I mean they show all of this history on TV with the African man and the early stages of the white man. I'm just glad they discovered how to start a fire so that they could stay warm and could cook their food. I mean could you imagine eating raw meat 24-7?
499722
Conveyor belt systems may be used to fill hoppers which feed the burners in boilers.  The most common common way to get coal actually into the combustion chamber is with an auger feed system.  Like a meat grinder, the conveyor will feed the hopper, and the augers will deliver it into the burner.  Other systems combine the conveyor, hopper, and auger with a grinding system to make coal dust which is "blown" into the chamber with a fan.  Check out the website.
213672
When you walk on the rug..., the motion of your feet dragging (even thou you don't think you're dragging your feet) creates a static charge which you end up having more electrons than your environment..., so when you touch something..., those extra electrons get released... If you have a strong enough charge..., you actually see it..\n\nI would avoid walking around in socks
1020818
Not unless they are incapable of walking.
1117399
Both are unanswerable questions. Fire does not weigh anything. It is just really hot air (a plasma), caused by the combustion of molecules.\n\nWind does not start or end. It's caused by uneven heating of the Earth's surface. This causes the warmer air and the colder air to move, according to gas laws.