When a water droplet is placed on a freshly cut piece of wood, it spreads out to form a thin layer because the wood is
A.
not at equilibrium with the water
B.
cohesive to water
C.
at equilibrium with the water
D.
adhesive to water
Correct answer is D
Adhesive surfaces are surfaces that are wetted by water. This means that the water molecules are attracted to the wood surface, and they spread out to form a thin layer in order to maximize their contact with the surface. The adhesive forces between the water molecules and the wood surface are stronger than the cohesive forces between the water molecules, resulting in a thin layer.
