Which is a false statement about the possible benefits of nanocars?
a. they could work together to build really complex things.
b. they could increase the efficiency of building computer chips.
c. they could increase the ability to build things from the top down.
d. they could work as medical submarines searching the body for disease.

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.