Why are wood scraps that are burned for heating sometimes referred to as "hog fuel"?
109049
pigs used to be fed anything including human waste. so i guess that you could feed them scraps of wood just so they would have something to munch on. i know that you can feed cows sawdust but not for very long.
714674
The heat of the flame must be burning hotter at the top of the matchstick (which makes sense, since it's closer to the center of the flame) and that causes more of the wood fibers to burn.  When there's more material gone on the top than on the bottom, it curls up, the way a hot dog does on the grill.
1182706
because alcohol evaporates the oxygen the fire needs to burn.
997556
Most woodstoves today are lined with firebrick which means the actual temperature of the iron in a woodstove will be quite low, relative to 1000C.\n\nIn an unlined woodstove, the iron does in fact burn off very slowly. It will likely just burn the surface layer. However, over the years, an unlined wood-burning stove will eventually "burn out" and must be repaced. I have experience with many woodburning sauna heaters which have burned out after a decade or two of heavy use.
697235
It's burned or kept for "research purposes".\n\nMakes me think of Soylent Green!
42430
Coal is formed by decomposition of wood.
464166
Yep.  Fossil fuels burn because they have carbon and organic substances in them.  Carbon = organic life; thus all petroleum must be derived from living substances.  Sure, other things burn that are not derived from living things; but not petroleum.
95627
i have study about this before 3 yrs but i will check my memory. this engine is called so because the fuel is burnt inside the combustion chamber means internally.it consists of a combustion chamber having an inlet valve so that fuel can enter inside the chamber and an outlet valve to forward the burnt fuel to the other stage. it also consist the piston which is one of the main parts of the engine without it we cant rotate the wheels. piston is also is in a closed cylinder which also have two valves andperform the same functions as they do in comb. chamb. after piston there is another cylinder which is used to throw out the exhausted fuel outside. i think this is enough
69491
Biomass is lumps of dead things.\nThe dead things were either plants or animals that ate plants (or animals that ate animals that ate plants).\n\nThe biomass could be burned to release heat and light.\nOr the biomass could be fermented to produce methane which could be burned to release heat and light.\nEither way, energy is available from biomass.\n\nIn the simplest case, say a plant being burned (logs for instance), from where did the plant get all that energy?
1064261
it's the same with a flame as well, I would assume that the heated gasses that burn off last are what causes it to be hotter.
1087539
When things "burn" the general reaction is as follows:\nCarbon + O2 --> CO2 + H2O\nThe CO2 and H2O are emitted as gasses, which means that the ash is everything that is left.  The composition of the ash depends on the starting material, and the black soot is most likely reduced carbon (such as graphite).
1176147
In a fire, Oxygen is not the fuel, it is the oxidizer.  Depending upon what is burning, the fuel could be any number of things.\nOxygen does not burn, but is required for combustion.\n\nIn order for something to burn, 3 things are necessary,\n-Fuel\n-An oxidizer (Oxygen)\n-[activation] Energy\n\nUnless these 3 things are present, the object in question will not burn.\nIf we assume fuel and Oxidizer are plentiful, then the only thing left which will keep something from burning is that extra bit of energy needed to set off the reaction.  After one gets a fire going, usually, this energy is provided by the excess heat the fire generates, but it needs to be supplied initially by some form (for example, lighting a match to start light a candle).\nIf one were to take away the fire's ability to provide its own activation energy, it would go out unless supplemented by some outside source.\n\nWhen a gust of wind blow out a fire, it is blowing away the energy the fire needs to burn, it is cooling it off too much for it to continue burning.
958252
It's when you burn something to offer it to a god or gods, usually on an altar made for this purpose - made of stone and outside.  Many ancient cultures practiced this; it was believed that the smoke rising to heaven and the transformation via fire sent the essence of the grain or lamb or whatever, to the god(s).
1138405
Well, I am not a chemist.  If I had to take a stab at this I would GUESS it's because the ash is dry and not very absorbent and the kerosene is still able to give off enough fumes to be ignited.  However, the soil is moist and can absorb more of the fuel in such a matter than there aren't enough fumes to be easily ignited.\n\nThat's a guess.  I have never actually encountered what you are describing.
1022045
I have never heard of it. I have butchered hogs (not commercially) and that idea has NEVER come up. I cannot see any logical reason to do it. I think he was making it up. How did he say he did it?
1126874
Your confusion lies in the sentence "How can such an intense heat not spread so far that it combusts the entire room as well?"  You are presuming an intense heat for some reason.  In my mind, the fact that nothing else burns means the heat was NOT intense. \n\nThe best hypothesis for this phenomenon is that the fat in the body melts and flows into a substance that works like a wick, such as clothing or upholstery.  The fire burns rather slowly and tamely so nearby temperatures don't increase enough to flash combust anything. This is just like the fire in a candle wick not burning the parts of the wick that are just below the flame, or a candle burning down to nothing without significantly heating up whatever it was sitting on. \n\nThe fat hypothesis explains why the head and limbs and associated clothes are unburned. \n\nYou could do a simple experiment.  Take a nice slab (not slices) of bacon and a long needle and thread a nice thick piece of cotton yarn through a fatty section. Warm the bacon to body temperature (maybe in a microwave on low or a warm oil bath). Put the bacon on a pan or metal outside. Maybe stick some rags or newspaper around the bacon, but not in contact to simulate "the rest of the room" Light the yarn that is sticking out. Shield the whole set up from wind so you don't have flaming pieces of wick flaking off and setting dry grass in your neighbor's yard on fire.\n\nI bet all the fat burns away over a period of many hours, leaving behind fairly uncooked meat, and unignited rags.\n\nYou might try repeating the experiment with a strip of cloth just sitting on top of the bacon. Again, the bacon has to be warm enough for some of the fat to flow. Maybe a large enough cloth will cook the whole slab, but I bet it still takes hours and the area around it doesn't get super hot.
236633
It doesn't burn like wood. That is, its material does\nnot combine with oxygen as in a conventional burn. Rather,\nthe nuclei of hydrogen and helium atoms fuse under incredibly high heat forming heavier elements. This is the\nkind of nuclear reaction we create in the ignition of a hydrogen bomb. In this case, the high heat is obtained from\na uranium or plutonium atomic bomb which a part of the device.  The fusion results in even more heat, light and radioactive energy.