Dana Crist
Mrs. Hawkins
H Biology 9- Period 4
28 November 2016
How Does Wind Speed Affect a Candle Flame?
Wind has been around since the beginning of time with the ability to move air. Air contains roughly twenty percent oxygen, and this oxygen is what the entire human race lives on to breathe and function. Oxygen, also, is very reactive and is involved in many chemical reactions here on Earth. One of oxygen’s key relationships is its one with fire. Fire has given humans a light source for thousands of years and plays a great role in the development of their species. A popular way in which fire is manifested is through the use of candles. The fire on a candle is affected by wind, but how does wind speed affect a candle flame? The flame
…show more content…
The oxygen and air are proven to be very important to the combustion of the fire when Drysdale states “While “removing the supply of air” will certainly cause the fire to extinguish, to do this it is only necessary to reduce the oxygen concentration below a critical level” (Drysdale). With oxygen being one of the three necessities of the fire triangle (a fuel and heat are as well), it is imperative that it must stay in contact with the fire to maintain the combustion process. The reasoning behind oxygen being such an important element of fire’s survival is that it serves as the reactant in the production of heat. Combining with the fuel, usually made of hydrogen or carbon, allows for the production of CO2 and H2O. These compounds form the body of fire. Since wind carries oxygen, it would add extra oxygen to the fire. This would then fuel the fire and make it react in combustion even more. The text relays the speed of wind as a major factor in the spread of fire in revealing “First, the wind induces a forward lean of the flame front, which reduces the distance between the flame and the unignited fuel. Second, increased wind speed also increases the rate of convective heat transfer between the heated air and the unignited fuel particles” (What Variables Influence Fire Behavior?). This would then imply that the greater wind speed would push the fire closer to the ground than a lesser one. Thus, this would reduce the time it takes for the flame to spread. A greater wind speed will have a profound effect on the movement of the heat if it spreads faster. The heat would affect nearby surroundings faster, increasing the spread even faster. Wax should follow this criteria and burn faster with a faster spread of
- Results: When a lighted match was held 2cm away from the unlighted candle in its smoke, the flame would jump from the match to the wick having been carried by the smoke.
Introduction: Today scientists put acquired data into a form of a graph. This said graph is designed to help make predictions and furthermore, study and understand the experiment and its contents at hand. The Graphing and Estimating lab involves just that. The lab is designed to collect data from several tests involving burn time of a candle.
Wildfires need three things called a fire triangle they have fuel source,drywood,plants,oxygen, and a heat source. Every year wildfires burn more than 400 acres. Wildfire can damage homes or buildings and could kill people. Firefighters also fight fire by cutting dead grass.
The winds were up to 70 miles (110 km) per hour whipped the flames into a frenzy as individual blazes united and formed a gigantic conflagration. Balls of fire shot up into the air hitting branches and debris making them burn more the balls of fire eventually fell as far as 50 miles away that’s 80 km the fire spread so
Candles are a convenient way of providing light and heat when no electricity is available. They are normally made from paraffin wax with a wick in the middle. Candles can also be made from soy wax or other plant wax, animal fat or bee wax. Wax acts as a fuel to keep the candle burning. The wick has to be an absorbent twine with
There was also a subtle breeze. That was a major part of the fire because it is number one it fed the flames so they could grow and get bigger and spread faster. Number two the wind would carry embers everywhere that would, if hot enough, would catch another house on fire and then another until the whole town was in flames. The wind could also tale like burning cloths and through them to house to house. Also the light breeze would carry the embers across the river and catch even more on
1. Place a small amount of wax from a birthday candle into a test tube. Heat gently over a burner flame until the wax melts completely; then allow
In addition to lightning the absence of rainfall, humidity, wind and both Sawgrass and Pine Rockland from the Everglades assist fires in their ability to move quickly.
These winds were also very hot and dry as they came from the tropics and before coming to Victoria they passed over the area of dessert outside the Sahara. They also provided oxygen which the fire needed to keep burning, this greatly intensifying them. The winds also carried burning embers downwind, which started new fires.
It blazes with passion, burning everything that'll stand in its path, only to burn quickly or to die down slowly.
Fuel is a less combustible material that burns slow and steady once lit, like tree trunks, coal and oil. To start a fire, first the tinder is lit on fire. Then the kindling on top of it catches fire. When the kindling produces enough heat, the fuel will catch on fire. When all three ingredients are present in the correct amount, oxygen, heat, and fuel will start a fire and keep it burning.
The history of fires goes back to the 17th century. They were called, “Fire buckets”. They came into existence because there was no fireman. Fire buckets were people organizing themselves like a human chain with buckets passing around. There was at least two to three buckets full of
sound waves have the potential to manipulate both burning material and the oxygen that surrounds it.
On the actual day of the fire, the fire planners will again check such conditions as wind and moisture content in the vegetation. The wind direction will determine where the fire is started. Fire crews start the burn with a device called a drip torch. A drip torch is a can of fuel with a flame-carrying wick at the end. When the crewmember tilts the wick toward the ground, a flame streams out and ignites the vegetation. Most of the effort that goes into a prescribed fire is making sure that it is contained in the boundaries set for the fire. Firefighters and fire suppression equipment are near the site if the fire grows out of control (www.nps.gov/wica/fir-why.html, pgs. 1-3).
Fire is explained in a tetrahedron of necessary requirements a fire needs before it is able to spring to life. First, is sufficient fuel. Different types of fuel coincide with different types of terrain. In dry, sparse areas, dead grass and shrubs provide the best fuel. In lush, green forests, pine needles, leaves, twigs, and other such things typically underfoot makes for the best fuel . Second, is an oxidizing agent. This could be the oxygen