Greencastle-Antrim School District proudly puts Children First, and that philosophy guides every decision and every action across the district. Our children represent the future of our community, and we work hard to live up to our mission to create and provide opportunities for all students to become lifelong learners and productive citizens.
The two types of high explosives are Primary explosives, which are easily ignited or detonated and are very sensitive to heat and friction, and Secondary explosives, which are usually much less sensitive to heat and friction and they typically have to be ignited through the use of other explosive materials.
Gases - Explosion and Flammability Concentration Limits. Flame and explosion limits for gases - propane, methane, butane, acetylene and more. The Flammable Range (Explosive Range) is the concentration range of a gas or vapor that will burn (or explode) if an ignition source is introduced. Three basic requirements must be met for explosion to take place: flammable substance - fuel.