The sides of a triangle are used to represent the three factors (oxygen, heat, fuel) needed for combustion and flame production; removal of any of the three factors causes flame production to cease.
http://www.assessco.co.uk/wp-content/uploads/2009/02/fire_triangle_50.png Fire Triangle
The energy that an atomic system must acquire before a process such as a reaction can occur.
Activation Energy http://www.soes.soton.ac.uk/staff/pmrp/GY102/module1/m1f9.GIF
Without heat, a fire cannot begin, and it cannot continue. Heat can be removed by the application of a substance which reduces the amount of heat available to the fire reaction. Also, heat is one of the elements on the Fire Triangle.
Heat/Energy & Fire Triangle? http://www.survival-gear-guide.com/image-files/fire-triangle.jpg
The cooktop of your stove is an example of the fire triangle because it needs all the elements that the fire triangle has. (heat, fuel, and oxygen)
Cooktop of your Stove http://mountainheritage.com/blog/uploaded_images/a-kitchen-stove-734878.jpg
An engine in which the combustion of a fuel occurs with an oxidizer usually air.
NASCAR has suspended driver Carl Long for the next 12 Sprint Cup races and fined crew chief Charles Swing $200,000, the largest penalty in the sport's history. Swing also was suspended until Aug. 18 for using an engine that was too big for NASCAR's specifications at Lowe's Motor Speedway.