Jennifer Tumlin Tallmadge HS Water on a penny What causes this Discuss it with your neighbor Describe the role that cohesion and adhesion play What do these illustrate Surface Tension ID: 935050
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Slide1
Post-Lab Discussion
Wacky Water
Jennifer Tumlin, Tallmadge HS
Slide2Water on a penny.
What causes this?
Discuss
it with your neighbor.
Describe
the role that
cohesion
and
adhesion
play.
Slide3What do these illustrate?
Slide4Surface Tension
Slide5What determines surface wettability?
Did you figure out the 2 responsible factors?
Some hints…..
Slide6Lotus Leaves
Slide7Micro-structures on the leaves from 10 to 0.4 micrometers
Slide8Slide9Slide10A B C D E
Slide11Nature Know-How…
Slide12Thorny Devil from Australia
Slide13Darkling Beetle from Namibia
Slide14Slide15Slide16Everyday applications?
Slide17Uncoated
WD40
Thompson
Quik Wax
Never Wet
Glossing
Polish
Generic
Carnauba
Perfluoro
Maleic
Anhydride
Contact Angle
Sandpaper Grit