[Phys-L] Re: HRSI (High-Temperature Reusable Surface Insulation) picture

[Marc Kossover <zeke_kossover@YAHOO.COM>]

--- Brian Whatcott <betwys1@SBCGLOBAL.NET> wrote:

> Which reminds me - silica aerogel is a material
> whose density is listed at
>   0.08 gm/cc while a list of common gas densities
> shows hydrogen at
> 0.09 gm/cc.
>
> Is it surprizing then that a NASA spokesperson  once
> publicized this
> "space-age" material as lighter than air - so that
> it floats.
> [or not - as the case indeed is]

Apparently, aerogel is a pretty good insulator.
There's a picture at
<http://stardust.jpl.nasa.gov/spacecraft/aerogel.html>
of a bunsen burner heat a piece of aerogel with a
flower sitting on top. (Click on the smaller picture
for a larger one.)

Marc "Zeke" Kossover
The Jewish Community High School of the Bay




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