One veteran conservative education reformer describes himself as âfurious and frustratedâ by the increasing dominance of social justice warriors in education reform and the marginalization of dissenting views. âIt's an existential threat,â he notes.
Class A or Ordinary Combustibles ... Class B or Flammable and Combustible Liquids ... Class K for fires that involves combustible or fats cooking oils in well ... â PowerPoint PPT presentation.
Both modes of fire involve three essential elements: fuel, oxidizing agents (usually oxygen from the air), and a temperature high enough for the reaction to proceed (heat). In addition, the flaming mode of combustion also involves uninhibited chain reactions (collision of molecules to sustain flame continuity). In each mode all of the basic requirements must exist for the fire to start and be sustained. In most cases, flaming combustion will cease if the oxygen concentration is