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Geology/Density

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Question
The long and the short of it is that I can't scientifically pin down the meaning of density. (If density is a mass of a substance per unit volume, what does this actually mean?) Therefore, could you please explain DENSITY in layman's term?  In addition to that, what is the meaning of the following phrases: "less dense" and "more dense"?

Answer
Dear Johnny, Fraternal Greetings!

As you said the meaning of the density is the Weight (mass) per unit of volume used as a measure of the compactness of a substance. More vaguely the degree of compactness of a substance. It is, essentially, a measurement of how tightly matter is crammed together.
High density (more dense) means high compactness of material and low density(less dance) means lesser the compactness of the substance. Rocks have such a high density, they are heavy so when you throw them at people it will hurt them.
Wood floats and stone does not, it is because the wood has a lower density than water, but stone is much denser than water.


with regards

Geology

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Dr D S Subrahmanyam

Expertise

All questions related to Geology, Geotechnical Engineering (especially in-situ stress, in-situ Deformability and Shear investigations) required for underground tunnels and excavations, Dimensional Stone Mining. Can't answer Soil dynamics related to Geotechnical Engineering

Experience

Geology and Geotechnical Engineering and Dimensional Stone Mining

Organizations
National Institute of Rock Mechanics (Govt of India)

Publications
International Journal of Mining Engineering and some other Indian journals

Education/Credentials
Doctorate in Geology

Awards and Honors
Reviewer for 3 International Journals

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