Which statement best defines Low Explosives?

Which statement best defines Low Explosives?

• A. Low Explosives are defined as explosives that have a slower speed of sound.
• B. Low Explosives are explosives with the lowest explosive yield.
• C. Low Explosives are explosives that are easy to detect with sniffers.
• D. Low Explosives are explosives requiring no primer.

Answer: (A)

Low explosives are defined by how fast the reaction propagates through the material. They burn or deflagrate at subsonic speeds, meaning the reaction front moves slower than the speed of sound in the substance. Because of this slower, subsonic propagation, they don’t create the strong shock wave that high explosives produce when they detonate. So describing them as having a slower propagation speed is the most accurate way to distinguish them from high explosives, which detonate with speeds well above the speed of sound in the material. The other ideas—yield, detectability by sniffers, or whether a primer is required—aren’t how these materials are categorized. Yield can vary with amount and is not the defining characteristic, sniffers detect many substances and isn’t a defining trait, and primer requirements aren’t universal for classifying low versus high explosives.

Low explosives are defined by how fast the reaction propagates through the material. They burn or deflagrate at subsonic speeds, meaning the reaction front moves slower than the speed of sound in the substance. Because of this slower, subsonic propagation, they don’t create the strong shock wave that high explosives produce when they detonate. So describing them as having a slower propagation speed is the most accurate way to distinguish them from high explosives, which detonate with speeds well above the speed of sound in the material.

The other ideas—yield, detectability by sniffers, or whether a primer is required—aren’t how these materials are categorized. Yield can vary with amount and is not the defining characteristic, sniffers detect many substances and isn’t a defining trait, and primer requirements aren’t universal for classifying low versus high explosives.