Soil Mechanics and Foundation
A fully saturated soil is said to be

two phase system with soil and air
one phase system
three phase system
two phase system with soil and water

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Soil Mechanics and Foundation
For a loose sand sample and a dense sand sample consolidated to the same effective stress

ultimate strength is different but peak strength is same
ultimate strength is same but peak strength of dense sand is greater than that of loose sand
ultimate strength is same and also peak strength is same
ultimate strength is same but peak

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