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Composition C4 is a plastic explosive based on a chemical called RDX. When the explosion begins, it takes place so rapidly that it cannot be timed except by very special scientific timing devices. if you had a block of C4 that was 26,550 ft long, it would take one second for an explosion that started at one end to reach the other end. That is a bit over 18,102 miles per hour. An explosion that moved that fast would go completely around the Earth in one hour 22 minutes.

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∙ 13y ago

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