We use two categories to describe soils: coarse-grained and fine-grained soils. 1) Explain why we separate soils into two categories. 2) Explain how physical/chemical/mechanical difference between two categories.

What is meant by the shear strength of soils? O A. Shear strength of a soil is its internal resistance to deformations. B. Shear strength of a soil is its iexternal resistance to shearing stresses. O C. Shear strength of a soil is its internal resistance to shearing strains. O D. Shear strength of a soil is its internal resistance to shearing stresses. QUESTION 14 Some soils show a peak shear strength? O A. These soils are generally firm (e.g. normally consolidated clays) and the confining stresses are large enough to suppress O B. These soils are generally dense and are large enough to O C. These soils are generally dense (e.g. dense sands and overconsolidated clays) and the confining stresses are not large enough to suppress dilation. O D. These soils are generally LOOSE (e g. loose sands and underconsolidated clays) and the confining stresses are large enough to suppress dilation. suppress dilation. dilation.

Write Stokes' law and define all variables. Discuss, in short, how this law is useful in determining the grainsize distribution of fine-grained soils.

Explain why we seperate soil into two categories