Calculate the settling velocities for particles with the following dimensions: a. Diameter=500 μm, density=1.2 g/cm³ b. Diameter=50 μm, density=1.8 g/cm³ c. Diameter=150 μm, density=1.3 g/cm³

the 100 cubic centimeter soil sample above starts to drain. calculate the volume of air at the following water contents: 70% 50% 30%

Suppose the following values are obtained through a Constant Head Apparatus while measuring permeability. Calculate the coefficient of permeability.           ·           Volume of water passing through soil in time (t) = 100ml           ·           Cross-sectional area of specimen = 500 mm2           ·           Thickness of specimen = 8 mm           ·           Hydraulic head = 5 mm           ·           Mean temperature of water during test = 20oc Time interval t = 2 minute

Flow velocity of water 1.25 cm/sec is observed in a continuous flow settling tank 4.5 m deep and 60 m long. The diameter of the particles of specific gravity 2.65 that may be effectively removed is (Assume temperature is 25°C and kinematic viscosity of water v = 0.01 cm2/s).