How do high explosives differ from low explosives in terms of thermal effects?

High explosives are characterized by their ability to produce a rapid release of energy, leading to a shock wave that travels faster than the speed of sound in the surrounding medium. This results in a short duration of the thermal effects following detonation, as the energy is delivered almost instantaneously. The rapid combustion associated with high explosives generates intense heat and pressure, but this phenomenon occurs over a very brief timespan.

In contrast, low explosives burn at a slower rate and produce gas and pressure that accumulate over a longer period. This slower reaction provides a sustained thermal effect, making low explosives suitable for applications like propellants in firearms or fireworks, where a consistent and prolonged burn is desirable.

Understanding the distinction in thermal effects between high and low explosives is crucial for their appropriate application in various fields, such as demolition, military uses, and pyrotechnics.