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Re:The tragic physics of the deadly explosion in Beirut by a2tech on Monday August 10, 2020 @09:09PM (#24116187)
I've been led to believe that 'high' explosives are explosives that explode/combust faster than the speed of sound. Others (like black powder) burn slower.
Re:The tragic physics of the deadly explosion in Beirut by hn2fast on Monday August 10, 2020 @10:55PM (#24116736)
More than just burn, 'high' explosives detonate [0], where the pressure wave itself provides the activation energy required to sustain the reaction.

[0] https://en.wikipedia.org/wiki/Detonation