What force does the water exert on the man?

Why is water sticky on a micro level but not a macro level & how does this relate to the Lotus Flower's (contd?

  • (contd) ability to stay dry and clean? 'Scientists discover water is sticky on a small scale' http://www.physorg.com/news66320589.html "At a high enough humidity, water vapor condenses in the tiny region between two surfaces (here, a tungsten tip of a friction force microscope and a graphite surface). Scientists have found that – unlike on the macro scale – the “liquid” acts more akin to a glue-like solid at room temperature, creating excessive friction that disables many tiny mechanical devices. When water vapor condenses in a nano-sized space between two surfaces, the liquid behaves more like solid ice than liquid water, even at room temperature. This solidification causes water to exert such a strong friction force that it “acts like a glue,” according to a new study." (contd.) I think it explains it in the article, but I still don't get it lol. And is this the same process that explains how the water condensate leaves the leafs of the lotus flower? http://www.physorg.com/news175430726.html

  • Answer:

    The most recent research regarding the 'stickiness' of confined water at room temperature was published online just this March. The authors (Noah Kastelowitz, Jessica C. Johnston, and Valeria Molinero) apparently were able to reproduce the phenomenon reported in the article to which you referred. And they call this new polymorph of water ice "bilayer ice." Moreover, they claim that the melting point of bilayer ice might be as high as 310 K (98.3 F)!

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In small amounts, water has a tendency to bead, taking a spherical shape. Depending on the surface material, the water can roll off rather than adhering to it. The lotus leaf has a double structure that splits the water into small amounts that bead off, picking up dirt as it goes.

pygonza

The leaves of the Lotus flower do not nearly touch another object on a nano scale so I would think no to your question, it is not the same process. Would be interesting to hear where you want to go with this. Maybe I am not grasping what actually happens with those leaves. Is it not just a process of evaporation or am I missing something?

claptic

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