What is the unit weight of water, Civil Engineering

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In a pipette analysis, 0.5 N of dry soil (fine fraction) of specific gravity 2.72 were mixed in water to form half a litre of uniform suspension. A pipette of 10 ml capacity was used to get a sample from a depth of 10 cm after 10 minutes from the start of sedimentation. The weight of solids in the pipette sample was 0.0032 N. Suppose the unit weight of water and viscosity of water at the temperature of the test as 9.8 kN/m3 and 0.001 N-sec/m2 respectively, verify the largest size of the particles remaining at the sampling depth and percentage of particles finer than this size in the fine soil fraction taken. If the percentage of fine fraction in the original soil was 50, what is the percentage of particles finer computed above in the entire soil sample?

 


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