Much pollution fills the air because of train s which let off steam that contains chemicals.
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
How does corporate power affect farmers? Unchecked corporate power distorts markets and leaves farmers and ranchers vulnerable to abuse and unfair practices. Because farmers rely on both buyers and sellers for their business, concentrated markets squeeze them at both ends.
Answer:
The magnitude scale is logarithmic. That just means that if you add 1 to an earthquake's magnitude, you multiply the shaking by 10. For example, if the magnitude of one quake is 6 and another is 4, than the difference in magnitudes is 2, so the stronger earthquake shakes 10^2 or 100 times as hard as the milder one
Answer: Wetland restoration and protection is important to maintain critical wildlife habitat, help meet state and tribal watershed goals and contribute to economic well-being. ... States and tribes enjoy numerous benefits of restoration and protection due to the many functions that natural wetland systems perform
Explanation:
