Date: Fri, 5 Sep 2003 13:37:31 -0400

Author: Chuck Britton

Subject: Re: thermometers

Post:

We always used liquid nitrogen but a dry ice acetone slurry would
probaly work for most thermometers.

Slowly lower the mercury bulb toward the LN2 (in a dewar flask).
Watch the column and when the break has been sucked into the bulb -
you are DONE.

My min/max thermometer at home uses a magnet to slide the markers up or down

OK, ya'll, at 11:46 AM -0400 9/5/03, Louis Haas wrote:
>Hi All, A friend of mine (not a member of the list), would like to
>know if anyone knows how to deal with mercury that has separated in
>a thermometer, and how to position the markers in a min/max
>thermometer. His e mail address is you
>can directly respond to him, his name is Bill, thanks...Lou


--
Chuck Britton Education is what is left when
britton@ncssm.edu you have forgotten everything
North Carolina School of Science & Math you learned in school.
(919) 416-2762 Albert Einstein, 1936
From slally@sewickley.org Fri Sep 5 13:44:58 2003
Message-ID: <3F58CC2C.2090205@sewickley.org>
Date: Fri, 05 Sep 2003 13:47:24 -0400
From: Sean Lally
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To: tap-l@listproc.appstate.edu
Subject: Re: sulfur hexafluouride
References:
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> -except that I can't sing tenor (but that's ok because I couldn't sing
> tenor before either :-)


My choir teacher once told me to sing tenor - ten or fifteen feet
farther away from him.

And then he said for me to sing solo - so low he couldn't hear me.

But seriously folks.....

Sorry.... it's Friday.

Have there been any problems with this demo? Any scary moments?

sean

From sampere@physics.syr.edu Fri Sep 5 14:04:04 2003
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Date: Fri, 05 Sep 2003 14:07:21 -0400
From: sampere
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To: tap-l@listproc.appstate.edu
Subject: Re: sulfur hexafluouride
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So would hydrofluoric acid vapor!!

sam

David Kardelis wrote:

>I've never done it but the Chem Professor I had in college did. I
>believe he bubbled the gas through Hydro Fluoric acid? HE said this
>would filter out any SF4 or convert any SF4 to SF6. I don't remember
>which one. He did it every year with no problems I guess the SF4 is
>highly reactive and would eat your lungs out very quickly.
>
>dave
>
>David Kardelis, Ph.D.
>david.kardelis@ceu.edu
>Chairman, Dept of Chemistry and Physics 435-613-5258
>College of Eastern Utah
>435-613-4201 (fax)
>451 E 400 N
>Price UT 84501
>
>-----Original Message-----
>From: Jason St. John [mailto:stjohn@BUPHY.bu.edu]
>Sent: Friday, September 05, 2003 9:12 AM
>To: tap-l@listproc.appstate.edu
>Subject: sulfur hexafluouride
>
>What purity do I need if someone wants to try inhaling SF6? "Instrument
>Grade" is available from Airgas, and 99.9% pure. That's a real
>measurement. They say they can't sell that grade for human consumption,
>but their concerns seems to be about drug-testing forms rather than
>toxicity. While I'm waiting for the rep to call back, I'd love some of
>that good old fashioned tap-l discussion.
>
>-jmsj
>____________________________________________________
>Jason St. John 617.353.2634 stjohn@bu.edu
>Boston University Physics Lecture Demonstrations
>590 Commonwealth Ave. Boston, MA 02215
>
>
From Roger_Feeley@umit.maine.edu Fri Sep 5 14:16:59 2003
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Date: Fri, 05 Sep 2003 14:19:37 -0400
Subject: Re: sulfur hexafluouride
To: tap-l@listproc.appstate.edu
From: "Roger Feeley"
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When I used to breath SF6 for the Wonders of Physics, there was a time when I breathed it at 98.3% pure or something like that.
Later I used the 99.9% pure stuff. I think the stuff we bought was "research grade."

When I bought it, I never told them what it was being used for.

It was my favorite thing to do. Unfortunately, over the years I started to get a reaction when I breathed it, so I don't do it any more.

And for those of you who are wondering, it has the opposite effect that helium has.

Also, SF6 is sometimes used to model Radon flow in houses.

tap-l@listproc.appstate.edu writes:
>What purity do I need if someone wants to try inhaling SF6? "Instrument
>Grade" is available from Airgas, and 99.9% pure. That's a real
>measurement. They say they can't sell that grade for human consumption,
>but their concerns seems to be about drug-testing forms rather than
>toxicity. While I'm waiting for the rep to call back, I'd love some of
>that good old fashioned tap-l discussion.
>
>-jmsj
>____________________________________________________
>Jason St. John 617.353.2634 stjohn@bu.edu
>Boston University Physics Lecture Demonstrations
>590 Commonwealth Ave. Boston, MA 02215
>



Roger Feeley
roger.feeley@umit.maine.edu
From danimal@Glue.umd.edu Fri Sep 5 14:21:04 2003
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Date: Fri, 5 Sep 2003 14:23:38 -0400 (EDT)
From: Daniel A Margulies
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My SF6 tank here at Maryland is clearly labeled "Industrial Grade." I
have taken quite a few hits from it in my day, and if I have suffered any
ill effects from it, they have been masked by the results of all of the
other dumb things I've done.

If my lawyer were here he would tell me to say that I am in no way, shape
or form suggesting, implying or telling you that you should follow my
clearly idiotic example. YMMV.

Dan Margulies
University of Maryland, College Park
Physics Lecture Demonstration
301.405.5995

--------------------------
"I know Jesus for my Lord but I don't understand why he says we should
love our enemies when their extermination would prevent so much evil."

-------- Robert Chase
From Gerald_Zani@brown.edu Fri Sep 5 14:26:26 2003

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