Final answer:
Densification from compaction is influenced by particle size, temperature, and pressure, with each factor contributing to how tightly material can be compacted.
Step-by-step explanation:
The amount of densification from compaction in materials depends on several factors. These include the particle size, temperature, and pressure exerted on the material. For instance, in the context of soil compaction, smaller particles may fit together more tightly under compressive forces, leading to increased densification. Similarly, temperature can affect the malleability of certain materials, which in turn influences how much they can be compacted. Lastly, the pressure applied is directly proportional to the densification; the higher the pressure, the more compacted the material can become. This concept is crucial in various engineering applications, including the manufacturing of industrial diamonds and the analysis of seismic wave speeds, which are influenced by the medium's density that itself depends on factors such as pressure.