Answer:
The Bulk density = 1.3 g/cm³
the porosity of the sample is 132 cm³
Explanation:
Given:
Volume of cylinder = 260 cm³
Mass of container and the soil = 403 g
Mass of the empty container = 65 g
Thus,
The mass of the soil is = 403 - 65 = 338 g
Now,
The Bulk density =
or
The Bulk density =
or
The Bulk density = 1.3 g/cm³
also,
average particle density for mineral soil is usually given as 2.65 g/cm³
i.e the air present in the given soil sample has reduced its density from 2.65 g/cm³ to 1.3 g/cm³
The mass of the whole sample = Volume × Density
= 260 × 2.65
= 689 gm
but,
The actual mass of the dry sample = 338 g
thus,
Mass of air in the sample = 689 - 338 = 351 g
Therefore,
the volume of 351 g soil =
=
= 132.45 cm³
so the porosity of the sample is 132 cm³
Australian Aborigines are sacred to the Uluru ( Ayers rock ) since 1872.
The Universal Declaration of Human Rights is generally agreed to be the foundation ... that basic rights and fundamental freedoms are inherent to all human beings, ... Building on the achievements of the UDHR, the International Covenant on Civil ... The obligation to protect requires States to protect individuals and groups.
Physical factors that affect population density include water supply, climate, relief (shape of the land), vegetation, soils and availability of natural resources and energy. Human factors that affect population density include social, political and economic factors.