Which of the following statements about mass property engineering is true?

The statement that the item contained can weigh more than the item it is contained in is true because it highlights an important principle in mass property engineering, specifically related to the context and design of systems. This situation often occurs in various applications, especially when dealing with containers or packaging that are designed to hold other items. For instance, if a small, dense object is placed inside a larger, lightweight structure, the weight of the contained item may indeed exceed that of the container itself. This is significant in systems engineering where understanding the mass distribution and leveraging it in design can lead to effective weight management and performance considerations.

In contrast, the other statements do not hold true within the realm of mass property engineering. While 3-D modeling tools are essential for creating accurate designs, they work best in conjunction with verification processes; thus, claiming all modeling tools are redundant ignores their complementary nature. Likewise, mass properties definitely do influence system weight, affecting performance and compliance with design specifications. Finally, while 3-D models provide a representation of designs, their accuracy always requires validation to ensure the final product's characteristics meet requirements.