Date: Fri, 12 Sep 2003 14:51:09 -0400

Author: Gerald Zani

Subject: Latent Heat

Post:

Tappers,

How do people demonstrate latent heat?


Thanks,
Jerry
Gerald Zani e-mail: Gerald_Zani@brown.edu
Manager of Demonstrations phone: (401) 863-3964
Department of Physics FAX: (401) 863-2024
Brown University Providence, RI 02912-1843 USA

URL http://www.physics.brown.edu/users/staff/zani/index.html
URL http://www.physics.brown.edu/Studies/Demo/

Do a little more of that work which you have confessed to be good,
Which you feel that society and your most Just Judge rightly demand of you.
Cultivate the tree which you have found to bear fruit in your soil.
If you have any experiments you would like to try, try them.
Now's your chance.
Henry David Thoreau, Journal entry, 1850.
From cbettis@unlserve.unl.edu Fri Sep 12 12:07:46 2003
Message-ID: <008001c3795e$a130ea10$96245d81@lecturedemo>
From: "Cliff Bettis"
To:
References: <8DB9C75E-E201-11D7-B96B-000393B080FA@valpo.edu> <5.2.1.1.1.20030912122427.00b79808@physics.montana.edu>
Subject: Re: 5D40.30 - radioactive discharge
Date: Fri, 12 Sep 2003 13:49:43 -0500
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I hope Zig didn't hear that!

Cliff

----- Original Message -----
From: "Jerry DiMarco"
To:
Sent: Friday, September 12, 2003 1:28 PM
Subject: Re: 5D40.30 - radioactive discharge


> Your coach must recruit from Utah and Nevada...
>
> Jerry
>
>
> At 12:38 PM 9/12/2003, you wrote:
> >Dale,
> >
> >We may be over regulated but at least the only people walking around
campus
> >looking like mutants are football players ;-) ...
>
>
> <><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
>
> Jerry DiMarco
> Manager of Lecture Demonstrations and Instructional Labs
> Montana State Univ., Physics Dept.
> Bozeman, MT
>
> Our Motto: "There's a demo in there somewhere."
From cbettis@unlserve.unl.edu Fri Sep 12 12:16:06 2003
Message-ID: <009901c3795f$cab96eb0$96245d81@lecturedemo>
From: "Cliff Bettis"
To:
Subject: Puzzle of two Salts (wasRe: 5D40.30 - radioactive discharge)
Date: Fri, 12 Sep 2003 13:58:02 -0500
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In case others are interested:

I used 737 g of Morton's salt (standard cylindrical package) irradiated =
for
3 days with a 500 C Cobalt 60 source (food irradiator). It turns the =
NaCl a
yellowish brown color (color centers) and when you drop some on a hot =
plate,
it scintillates (very pretty). I present it as the puzzle of two salts. =
I
show the students two salts, KCl and NaCl , and tell them one of them =
has
been irradiated with a very strong gamma source and the other is as it =
is
from the store. One is radioactive and the other is not, one will glow =
in
the dark (with a little heat) and the other will not. Which is which?

Cliff


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charset=3Diso-8859-1">




In case others are =
interested:

 

I used 737 g of Morton's salt (standard cylindrical package)=20
irradiated for
3 days with a 500 C Cobalt 60 source (food =
irradiator). It=20
turns the NaCl a
yellowish brown color (color centers) and when you =
drop some=20
on a hot plate,
it scintillates (very pretty). I present it as the =
puzzle of=20
two salts. I
show the students two salts, KCl and NaCl , and tell =
them one of=20
them has
been irradiated with a very strong gamma source and the =
other is as=20
it is
from the store. One is radioactive and the other is not, one =
will glow=20
in
the dark (with a little heat) and the other will not. Which is=20
which?

Cliff



------=_NextPart_000_0096_01C37935.E1C1ADE0--
From crsnel@vt.edu Fri Sep 12 12:30:05 2003
Message-ID: <3F621AB7.9010204@vt.edu>
Date: Fri, 12 Sep 2003 15:12:55 -0400
From: Clark Snelgrove
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To: tap-l@listproc.appstate.edu
Subject: Re: Latent Heat
References: <5.1.1.6.0.20030912144947.01c24ff8@postoffice.brown.edu>
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Pasco sell an appuratus to do the job. I have not used however.
Clark
From dstille@newton.physics.uiowa.edu Fri Sep 12 12:36:06 2003
Date: Fri, 12 Sep 2003 14:19:00 -0500 (CDT)
From: Dale Stille
X-X-Sender: dstille@newton
To: tap-l@listproc.appstate.edu
Subject: Re: Latent Heat
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JZ,

The only one I have on my shelf at the moment is Latent Heat of
Crystallization. Sodium Acetate handwarmer that goes from liquid to solid
with heat produced.

Later,
Dale

On Fri, 12 Sep 2003, Gerald Zani wrote:

> Tappers,
>
> How do people demonstrate latent heat?
>
>
> Thanks,
> Jerry
> Gerald Zani e-mail: Gerald_Zani@brown.edu
> Manager of Demonstrations phone: (401) 863-3964
> Department of Physics FAX: (401) 863-2024
> Brown University Providence, RI 02912-1843 USA
>
> URL http://www.physics.brown.edu/users/staff/zani/index.html
> URL http://www.physics.brown.edu/Studies/Demo/
>
> Do a little more of that work which you have confessed to be good,
> Which you feel that society and your most Just Judge rightly demand of you.
> Cultivate the tree which you have found to bear fruit in your soil.
> If you have any experiments you would like to try, try them.
> Now's your chance.
> Henry David Thoreau, Journal entry, 1850.
>
>
From MLowry@D115.ORG Fri Sep 12 12:43:10 2003

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