how much force is needed to accelerate a 1,000 kg car at a rate of 9 m/s2?
a.
13,500 n
b.
1,000 n
c.
9,000 n
d.
4,500 n

it's c. elements are placed in rows based on how may valencies electrons have.

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.