Discussion
Which of the following explosive is the lowest density ?
Answer: A
The lowest density explosive is ANFO.
ANFO is a mixture of porous ammonium nitrate prills with about 6 percent fuel oil. Poured loose, it has a bulk density of only about 0.8 to 0.9 g/cm\(^{3}\), which is why it is used in large quantities to fill boreholes in mining and quarrying.
Dynamite has a density of roughly 1.2 to 1.5 g/cm\(^{3}\), and the military high explosives PETN and RDX are much denser, at about 1.7 to 1.8 g/cm\(^{3}\) as crystals. High density is one reason the military explosives detonate faster and more violently.
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