Agate is good protective energy stone, especially for children, and is very calming and soothing. It also can help strengthen the body's connection to the earth.
The friction factor, f, is a dimensionless factor that depends primarily on the velocity u, diameter D, density Ï, and viscosity Î·. It is also a function of wall roughness which depends on the size Îµ, spacing Îµ' and shape of the roughness elements characterized by Îµ''.
The C-Factor is a measure of the smoothness of a pipe's interior. All pipes have a roughness that resists water flow and causes a drop in pressure under flowing conditions. The roughness is indicated by a factor we call the C-Factor. The higher the C-Factor, the smoother the inside of the pipe. New plastic pipe would have a very high C-Factor. Old steel pipe would have a much lower C-Factor because of the corrosion that may have occurred within the pipe.