Interruptions such as answering the telephone and checking e-mails fall under which of the following quadrants in the time management matrix? A. Quadrant 4
B. Quadrant 1
C. Quadrant 3
D. Quadrant 2

An atom's smaller negative particles are at a distance from the central positive particles, so the negative particles are easier to move. 

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