freestylerhb6
Harmless
Posts: 5
Registered: 21-10-2003
Member Is Offline
Mood: No Mood
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I need some backup
Once again I have a question that is elementary but that is the intelligence level of my teacher so here it goes...
Water beads on waxed cars because...
she says because water is cohesive and that is it.
However I thought it was because wax is nonpolar and water is unable to adhere to it so the cohesive forces are stronger. I asked her if I was right
and she said no. Am I wrong? I don't think so.
Thanks for any help.
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Theoretic
National Hazard
Posts: 776
Registered: 17-6-2003
Location: London, the Land of Sun, Summer and Snow
Member Is Offline
Mood: eating the souls of dust mites
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Your teacher should have said that water doesn't wet wax because it's polar, so surface tension does it's job.
Judging from previous posts and from the fact that "cohesive" is used as the term for surface tension, your teacher is unsuitable as a
science teacher (as any teacher in fact, because denied your explanation, which was in fact much more accurate than hers).
Change schools!   
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