1. For falling head permeability tests, the following data were recorded. -Length of soil specimen = 500mm -Area of soil

[answerhappygod]

1. For falling head permeability tests, the following data were
recorded.
-Length of soil specimen = 500mm
-Area of soil specimen = 16cm²
-Area of standpipe = 0.97 cm²
-Head difference at time t=0 is 760mm
-Head difference at time t=6 min, is 410mm
The test was conducted at a temperature
at 20ºC with a unit weight of water equal
9.789 KN/m³ and the viscosity of water
at 20⁰C is 1. 005x10⁻³N.s/m²
use k = ,
where =coefficient of permeability
= viscosity of water at 20⁰C
What is the head difference at the t=4 min