Which type of explosive has a reaction velocity of less than 1000 m/sec?

The classification of explosives is primarily based on their velocity of reaction and the type of reaction they undergo. Low explosives are characterized by their relatively slower reaction rates, typically having a reaction velocity of less than 1000 m/sec. This slower reaction rate allows low explosives, such as black powder or smokeless powder, to deflagrate rather than detonate, meaning they burn rather than explode.

In practical applications, low explosives are often used in propellant applications, fireworks, and certain blasting operations. Their controlled burn rate is essential when a gradual release of energy is necessary, such as in firearms or where precise applications are required.

In contrast, high explosives have a much faster reaction velocity, exceeding 1000 m/sec, and are designed to detonate. Primary explosives are sensitive materials that can detonate with a small disturbance, while secondary explosives require a strong initiator for detonation. Each of these types has distinct characteristics, but the defining feature for low explosives is their lower reaction velocity.