Which of the following is an example of how to supply activation energy to begin a reaction?
a. cool the reaction flask in an ice bath.
b. add a catalyst.
c. heat the reaction flask on a hot plate.
d. add an inhibitor. '

The event that is an example of how to supply activation energy to begin a reaction is adding a catalyst. The answer is letter B. Cooling the reaction flask in an ice bath, heating the reaction flask on a hot plate. And adding an inhibitor does not answer the question.

electron microscopy and scanning tunneling microscopes gives us a greater understanding of atoms by being able to see the atom itself, and lets us see some atomic reactions.

explanation:

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .