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A contact explosive is a chemical substance that explodes violently when it is exposed to a relatively small amount of energy (e.g. friction, pressure, sound, light). Though different contact explosives have varying amounts of energy sensitivity, they are all much more sensitive relative to other kinds of explosives.
A high explosive violent reaction (HEVR) includes reactions ranging from a fast deflagration of the high explosive (HE), up to and including a detonation of the high explosive. The explosive wave may be subsonic or supersonic.
In January 2024, students at a pro-Palestinian demonstration on campus were sprayed with a chemical that they alleged to be Skunk, a foul-smelling spray usually used as crowd control by the Israel Defense Forces, causing various injuries. [21] [22] [23] In response, demonstrators organized a protest outside the university. [24]
The violent chemical reaction ignited the detonator and exploded the mine. The mine did not have a safety or anti-tamper mechanism. Disarming one was a fairly simple procedure of unscrewing the igniter near the base, avoiding the fragile top. [4]
Slow motion videos are great with extreme sports and hilarious effects of pranks, but this technology can also turn plain chemical reactions into beautiful art. The project Beautiful Chemistry ...
This light is equivalent in energy to some of the stabilization energy of the energy for the chemical reaction, i.e. the bond energy. This light that is released can be absorbed by other molecules in solution to give rise to molecular translations and rotations, which gives rise to the classical understanding of heat.
A reaction must be capable of being initiated by the application of shock, heat, or a catalyst (in the case of some explosive chemical reactions) to a small portion of the mass of the explosive material. A material in which the first three factors exist cannot be accepted as an explosive unless the reaction can be made to occur when needed.
This week, we have seen excessive force used against non-violent protesters at UC Berkeley, UCLA, CSU Long Beach, and UC Davis. Student, faculty and staff protesters have been pepper-sprayed directly in the eyes and mouth, beaten and shoved by batons, dragged by the arms while handcuffed, and submitted to other forms of excessive force.