Date: Sat, 03 Dec 2011 07:31:51

Author: --- "Borislaw Bilash II"

Subject: Re: Sulfur Hexafluoride: who's using?

Post:

Anthony,

Wikipeadia provides a good list of uses of SF6. There are as LOT of uses --
one would be surpised.
http://en.wikipedia.org/wiki/Sulfur_hexafluoride

Also read the Discussion part: they mention an idea to use SF6 to establish
an atmosphere on the moon. The idea is, SF6 would not float away like other
gases. O2 (and other gases?) could be added and regularly replenished. The
SF6 would slow the escape of O2 considerably. Sounds like science fiction?
But then again, the Star Track communicator of the '60's is now used by
nearly everyone. Can't wait to breath on the moon. One day, perhaps.

Oh yeah... wiki mentions something about the speed of sound in SF6 being
0.44 of the speed in air. ;) ("I saw it on the Internet").

Borislaw

-----Original Message-----
From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] On
Behalf Of Anthony Lapinski
Sent: Friday, December 02, 2011 10:57 PM
To: tap-l@lists.ncsu.edu
Subject: Re: [tap-l] Sulfur Hexafluoride: who's using?

Okay, just how expensive is this gas? Where can one buy it? And what are the
"real" uses of this gas?

tap-l@lists.ncsu.edu writes:
>These three are standard demos at U. Maryland:
>
>F2-09: BUOYANCY - BALLOON IN HEAVY GAS
>http://www.physics.umd.edu/lecdem/services/demos/demosf2/f2-09.htm
>
>H6-05: SULFUR HEXAFLUORIDE VOICE
>http://www.physics.umd.edu/lecdem/services/demos/demosh6/h6-05.htm
>
>H3-75: TUNING BAR MYSTERY
>http://www.physics.umd.edu/lecdem/services/demos/demosh3/h3-75.htm
>
>I've used SF6 for several of the other things that have been mentioned
>as well. Very cool stuff! Too bad it's so expensive.
>
>Matt
>
>========================================
>Dr. Matthew Bobrowsky
>Director, Lecture Demonstration Facility Department of Physics
>University of Maryland College Park, MD 20742-4111
>
>Tel: 301-405-6045
>E-mail: msb@umd.edu
>http://www.physics.umd.edu/lecdem/
>========================================
>
>
>
>
>
>On 12/2/11 4:10 PM, "Steve Narf" wrote:
>
>> We use it all the time. From buoyancy, breathing, speed of sound,
>> density, and greenhouse gas.
>> It fun stuff.
>>
>> -Steve
>> UW-Mad
>>
>> On 12/2/2011 2:46 PM, David Sturm wrote:
>>> Curious to see who among taplers is ever using SF6.
>>>
>>> I know we floated a boat in Edmonton for the really big shew.... And
>>> I've done that before, and breathing (and then being damned careful
>>> to invert and exhale it... )
>>>
>>> Other folks with comments? Would be much appreciated.
>>>
>>> David
>>>
>>> **32d UMaine Physics Teachers Mtg: March 9, 2012
>>> ====================================================
>>> David E G Sturm - sturmde@maine.edu - 1.207.478.4937 (cell)
>>> --Physics& Astronomy Instructional Labs --ATOMIM Board --Bennett
>>> Hall Lecture Demo --AAPT Apparatus Vice Chair --Mainely Physics Show
>>> --PIRA Representative Physics& Astronomy Dept @ University of Maine
>>> 5709 Bennett -- Orono ME 04469-5709
>>> http://www.physics.umaine.edu/
>>> =============================================
>>>
>
>






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