a small piece of foam has a mass of 4.00g and a charge of -18.6uC. it levitates, motionless, when placed in a uniform electric field perpendicular to the ground. what is the magnitude of the electric field (in N/C)?

Answer(a)   the matererials that are in contact, the two materials and the nature of their surfaces/// (b)/// the force pushing the two surfaces together, pushing the surfaces together causes the more of the asperities to come together and increases the surface area in contact with each other

If you're looking for an even spread of clay, silt and sand, add a considerable amount of sand and some clay until the 3 even out". soil texture triangle. silty clay loam soil is approximately 20 percent or less sand, 25 to 40 percent clay, and 40 to 70 percent silt.

The answer is periosteum

When the warmer parts go up and the colder parts go down in a circular motion.