Final answer:
In physics, it is important to follow specific handling procedures for unfired shells or duds to ensure safety.
Step-by-step explanation:
In physics, handling procedures for unfired shells or duds are important for safety reasons. A shell that has not been fired or a dud is a projectile that contains explosives but has not functioned as intended. These shells can still be dangerous and need to be handled with caution.
Based on this information, the statement 'Handling Procedures; unfired shell or dud' is TRUE. It is crucial to follow specific handling procedures when dealing with unfired shells or duds to minimize the risk of accidents and ensure the safety of everyone involved.