Answer:
Wet unit weight = 1.94 g/cc
Dry unit weight =1.05 g/cc
density of saturation = 0.41
porosity = 0.43
Explanation:
given data
Void ratio = 0.78
Water content -12%
Specific gravity of solids - 2.68
to find out
Wet unit weight and Dry unit weight and Degree of saturation and Porosity
solution
we know that Wet unit weight formula is
Wet unit weight = 
density of water
here Gs is specific gravity of soild and e is void ratio and density of water is 1
so Wet unit weight = 
Wet unit weight = 1.94 g/cc
and
Dry unit weight = 
density of water
Dry unit weight = 
Dry unit weight =1.05 g/cc
and
density of saturation is
density of saturation = Wc × 
her Wc is water content
so density of saturation = 0.12 × 
density of saturation = 0.41
and
porosity is
porosity = 
porosity = 
porosity = 0.43
Explanation:
by creating more education to reduceilltarate people
The index fossils are fossils that are found in the rock strata of certain geologic period, but they are also fossils that are very common and can be found in numerous places around the globe.
Because they can be found all over the globe, and they are indicative of certain geologic period, the geologists have started to use them as a simple way of determining the age of the rock strata. While this method can not provide the geologists with an accurate year for the formation of the rocks, it is still able to determine the relative age of the rocks. By determining the relative age with such ease by using the index fossils, the geologists are able to immediately make conclusions about the rock strata, have basic information about it, and largely be aware of the processes that formed them and influenced them.
So, the question is asking: why has (over the course of human history) rural settlement declined (and it is suggested that this is connected to humans moving away from the rural areas, to urban areas, rather than human population declining in general:
this process is called urbanization and its major cause is that on the one hand, food in the industrialized societies can be produced more effectively so there is less work on farm, and on the other hand the service sector has increased, which means that there is more work in the cities.
