Physics of a Fire :: physics fire

Fire is a chemical reaction whcih shootfully three things to be present so it can happen group O, Fuel, and Heat.If unity of these is not present, the tone-beginning cannot start. If one of these is choosen from a fire it bequeath go out.But how does this all work? group OWe all stay type O (O) everyday - in fact, without it we would suffocate. But did you know that fire breathes Oxygen too? And, corresponding us, without Oxygen a fire will as well as suffocate.When Oxygen in the channelize combines with flammable vapours saluten stumble by Fuels - heat is produced and thus touchwood can occur.Without enough Oxygen, ignition cannot happen. In the opposite way, if there is too much Oxygen then the vapours wont be concentrated enough to break out. The ratio of vapour to Oxygen is known as the explosive or flammable limit and is different for each ordnance or vapour.HeatCombustion occurs when flammable vapours mix with air (Oxygen) and are ignited by a spark or flame. Solids give off flammable vapours by being heated. Certain solids much(prenominal) as paper or flour get along to ignite close to instantly. This is because they give off vapours and reach a flammable temperature just about immediately. In fact, fine dusts dispersed in the air can puff because they give off vapours and ignite so quickly it appear to happen instantly.Other solids like timber take longer to ignite because they are more dense and so dont give off flammable vapours so easily.FuelSo, in our fire triangle weve got Oxygen and Heat, but we also need something that will burn - this is our Fuel.Fuels can take almost any formSolids like wood, fabric, rubber and plastic.Liquids such as petrol, oil, cooking oil or even nail varnish remover.Gases like propane, butane and natural gas.If a fire broke out in your home today, would you automatically know which fire extinguisher to use? What would happen if you used a signifier A fire extinguisher on a fire in the electrical se rvice panel in your basement? come youd possibly be electrocuted if the extinguishing agent is a liquidA long time ago, the fire protection industry recognized the need to classify extinguishers according to the many kinds of burning materials encountered in a fire. For example, Class A, water-type fire extinguishers cannot be used on the electrical fires because the extinguisher means could be seriously injured by the conduction of electricity by the stream of water from their extinguisher.