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''.
It does not. Friction is the product of coefficient of friction and normal force. The coefficient of friction depends on the materials in contact with each other. The normal f â¦ orce (the force holding them together) increases only the magnitude of friction.