Re: [Phys-L] why ice is so slippery

[bernard cleyet <bernard@cleyet.org>]

> On 2018/Feb/17, at 12:08, John Denker via Phys-l <phys-l@mail.phys-l.org> wrote:
>
> Hi --
>
> A seasonal and topical bit of condensed-matter physics.
> Aimed at a general audience, but contains some hard
> numbers and makes a number of good points.  Contains
> links to primary sources.
>
>  Brian Resnick
>  "The surprising science of why ice is so slippery"
>  https://www.vox.com/science-and-health/2018/2/13/16973886/olympics-2018-ice-skating-science-speed
>
> TL;DR:  There's an ultra-thin surface layer that
> isn't really frozen.  

The article claims that other than ice has the same property, then write no way to try (Hg and Ga).  Well indium (~1/4) and gallium (~3/4) have a MP ~ 15 C--eutectic; perfecto.  


http://www.indium.com/low-temperature-alloys/  



bc has a block of an In alloy to make a spoon that melts in coffee  (or tea).  [Plaster mold coming up.]


p.s.  cheque w/ X-ray, or tiny robot skater on a small block of the alloy?  And note the claim:  vapor pressure “… substantially lower than mercury(’s)”.