Supplements vs. whole foods. Supplements aren't intended to be a food substitute because they can't replicate all of the nutrients and benefits of whole foods, such as fruits and vegetables. So depending on your situation and your eating habits, dietary supplements may not be worth the expense. An orange, for example, provides vitamin C plus some beta carotene, calcium and other nutrients. 2  It's likely these compounds work together to produce their beneficial effect. 3  Essential fiber. 4  Whole foods, such as whole grains, fruits, vegetables and legumes, provide dietary fiber.
Density index (or relative density) is the measure of compaction of non-cohesive soils naturally com-. pacted as a result of geological processes. It also is used for compaction control of non-cohesive soils built in. hydraulic embankments.
Density is a component of mass and volume, it is the mass per unit volume. This means that when you have two objects of similar volume and different weights, the difference is due to one having higher density than the other. A lay definition of density would be that it is how compact substance is packed together.