What describes a detonating cord?

A detonating cord is fundamentally a flexible cord filled with a core of high explosive material, which is designed to initiate explosions in a controlled manner. This core typically contains an explosive such as PETN (Pentaerythritol tetranitrate) or a similar high-velocity explosive. The primary purpose of this cord is to convey a detonation wave from one point to another, linking multiple explosives together, and allowing for synchronized detonations.

In mining operations and demolition, the use of detonating cords is crucial, as they enable the safe and efficient detonation of explosives at the required intervals. The design ensures that the cord transmits the detonation effectively, making it an essential tool in controlled blasting scenarios.

The other options lack the key characteristics of a detonating cord; they describe materials or safety measures that do not include the explosive core that defines a detonating cord's functionality.