Could surface tension explain why water "beads up" on the newly-waxed surfaces of a car but not on dirty surfaces? Explain.

Question

v-sync · Answer

@cuanchi @Will.H

yanasidlinskiy · Answer

Chemistry?

yanasidlinskiy · Answer

This is fresh in my mind because I'm taking Anatomy and Physiology the Unity of form and function or in other words the structure and function of the body parts. And chemistry comes in with this course as well. Me being the student within the class, I have done this experiment and came to a conclusion:
 Dirt is non-polar. Things can sink into dirty surfaces. Same goes wax paper. Don't forget that water IS polar. POLAR and NONPOLAR CANNOT MIX together. Keep that in mind. As for another example, when you fill water up in a cup, surface tension occurs.. Why?  Because H2O molecules are closely bonded at the top that forms surface tension.

sweetburger · Answer

H2O has a strong force of cohesion due to the fact that it experiences strong intermolecular hydrogen bonding which forces the water molecule to bunch together on the non-polar waxy surface.