If infrared waves can move information through air, what is the advantage of sending their signals through networks of cables? 
A.
Cables are easy to maintain.

B.
Cables transmit infrared waves over longer distances.

C.
The denser the medium, the faster the wave.

D.
These waves need to travel only short distances.

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.

d : a person who learns about the world by observing it. no that is not a smiley face

explanation:

it's