Flashcards in Chapter 2 Fire Behavior Deck (69)
A chemical reaction that requires Fuel, Oxygen, & Heat to occur.
A rapid chemical reaction that gives off energy & products of combustion that are very different in composition from the fuel & oxygen that combined to produce them.
Rapid self-sustaining oxidization process accompanied by the evolution of heat & light of varying intensities.
Study of the physical world around us and includes the sciences of chemistry & physics and the law related to matter & energy
The U.S. uses the English or Customary unit
Other use the Metric or International systems of units (SI)
The measurement of the gravitational attraction on a specific mass (customary unit LB's)
The capacity to perform work.
Transformation of energy from on form to another
(When a force is applied to an object over a distance)
(CU="Ft lb") (SI= "Joule")
Unit based on a force in expressed Newtons
Types of Energy
Energy released as a result of a chemical reaction
Energy a object in motion possesses
Developed when electrons flow through a conductor
Transferred between two bodies of differing temperatures.
(Sun & Earth)
Most common on earth
Visible radiation produced at the atomic level such as flame produced during the combustion reaction.
Energy released when atoms split(Fission) or Join (Fusion).
Nuclear power plants generate power as a result of fission of uranium-235.
Atoms join together
Energy exists in two states
Kinetic-energy possessed by a object in motion
Potential- Energy possessed by an object that can be released in future. (rock on cliff)
In fire, Fuel is potential chemical energy, as it burns its converted to kinetic energy in the form of heat and light.
Energy possessed by a object in motion
Energy possessed by an object that can be released.
"Rock on a cliff"
Amount of energy delivered over a given period of time.
Amount of heat required to raise the temperature of 1 Gram of water 1 degree Celsius.
Amount of heat required to raise 1 Lb of water 1 degree Fahrenheit
Mechanical equivalent of heat.
Relationship between the calorie and Joule
1 Calorie= 4.187 Joules
1 BTU= 1,055 Joules
Heat can be transferred from one body to another by 3 mechanisms
Point to point contact
*Heat transferred early in the development of all fires is almost entirely due to conduction
Transfer of heat energy by the movement of heated liquid of gases
* When fire grows
Transmission of energy as a electromagnetic wave.
(Light & Radio waves, X-rays)
Travels in a straight line at the speed of light.
Energy travels @ a speed of light from the sun through space"Vacuum" & warms the earth
* Cause of most exposure fires
Anything that occupies space and has mass
Physical appearance/Properties (Mass,Size,Volume)
Physical State (Solid, Liquid, Gas, Color, Smell)
Physical appearance/Properties of matter