| Topic: |
Science > Physics |
| User: |
"Mich" |
| Date: |
07 Aug 2003 04:54:10 PM |
| Object: |
The force of mercury |
I have this device in front of me, which exists out of a bulb, a line, and
at the other end a little cylinder thingy.
The cylinder thingy will move, whenever the temperature of the bulb changes,
but the force the cylinder has to deliver is guiet significant (about 60N)
Now, mercury is not allowed anymore here in the EU, so i have to replace
this device with something else, so i thought about using a different
filling, but the manufacturer states that another filling is not an option,
because other fillings can not deliver the force which mercury can.
I thought just by using a different filling, such as alcohol, it would just
work.
Where am i lossing out?
Whats up with the 'force' of mercury.
Which property of mercury defines the force it can deliver? I couldn't think
of any.
Mark
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| User: "Double-A" |
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| Title: Re: The force of mercury |
07 Aug 2003 09:43:53 PM |
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"Mich" <michelpl.nospam@xs4all.nl> wrote in message news:<3f32ca8b$0$49107$e4fe514c@news.xs4all.nl>...
I have this device in front of me, which exists out of a bulb, a line, and
at the other end a little cylinder thingy.
The cylinder thingy will move, whenever the temperature of the bulb changes,
but the force the cylinder has to deliver is guiet significant (about 60N)
Now, mercury is not allowed anymore here in the EU, so i have to replace
this device with something else, so i thought about using a different
filling, but the manufacturer states that another filling is not an option,
because other fillings can not deliver the force which mercury can.
I thought just by using a different filling, such as alcohol, it would just
work.
Where am i lossing out?
Whats up with the 'force' of mercury.
Which property of mercury defines the force it can deliver? I couldn't think
of any.
Mark
If handling mercury were as dangerous as these alarmist political
do-gooders who are outlawing it everywhere would have you believe, all
dentists would be suffering from chronic mercury poisoning!
Double-A
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| User: "Richard Herring" |
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| Title: Re: The force of mercury |
08 Aug 2003 06:19:19 AM |
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In message <79094630.0308071843.7ca93a5e@posting.google.com>, Double-A
<double-a@hush.com> writes
If handling mercury were as dangerous as these alarmist political
do-gooders who are outlawing it everywhere would have you believe, all
dentists would be suffering from chronic mercury poisoning!
Ssssh! You'll attract the amalgam guy!
--
Richard Herring
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| User: "Steve Harris" |
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| Title: Re: The force of mercury |
08 Aug 2003 07:00:35 PM |
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"Uncle Al" <UncleAl0@hate.spam.net> wrote in message
news:3F33EFA7.A328DCA9@hate.spam.net...
Uncle Al wrote:
If you eat a pound of calomel (HgCl2) you will excrete a
pound of
calomel. Mercuric (soluble) compounds of mercury are
deadly.
Calomel is Hg2Cl2. Corrosive sublimate is nobody's idea
of a good
time.
No, but it won't kill you. As a major component of Rush's
magic pills, the Lewis and Clarke expedition ate calomel for
years to offset their meat-diet constipation, and they all
made it back from a very demanding physical journey, save
for one guy who was lost fairly early.
Now, interestingly, that one guy died of appendicitis or
some gut problem, and I've always wondered if it wasn't some
hunk of Calomel trying to blast past something that would
have been bettter off with something more gentle. But we'll
never know.
SBH
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| User: "DarkMatter" |
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| Title: Re: The force of mercury |
08 Aug 2003 10:46:52 PM |
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On Fri, 08 Aug 2003 07:54:40 -0700, Uncle Al <UncleAl0@hate.spam.net>
Gave us:
She was doing mercury NMR and was filling an NMR tube with
dimethylmercury (calibration reference) using a Pasteur pipette while
wearing latex exam gloves. Stupid on both counts. Pasteur pipettes
oscillate delivery when dispensing dense liquids. Thin latex gloves
are zero barrier against non-polar materials.
http://pubs.acs.org/cen/safety/19970512.html
It was Karen E. Wetterhahn
Interesting last name, considering that she "wet her hand" with the
stuff.
http://www-ehs.ucsd.edu/lab/dimethylmercury_poisoning.htm
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| User: "DarkMatter" |
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| Title: Re: The force of mercury |
08 Aug 2003 07:36:07 PM |
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On Fri, 08 Aug 2003 11:44:55 -0700, Uncle Al <UncleAl0@hate.spam.net>
Gave us:
Uncle Al wrote:
If you eat a pound of calomel (HgCl2) you will excrete a pound of
calomel. Mercuric (soluble) compounds of mercury are deadly.
Calomel is Hg2Cl2. Corrosive sublimate is nobody's idea of a good
time.
Just one more atom in the molecule, eh? Wow.
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| User: "DarkMatter" |
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| Title: Re: The force of mercury |
11 Aug 2003 05:50:46 AM |
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On Mon, 11 Aug 2003 10:29:23 +0100, Richard Herring <junk@[127.0.0.1]>
Gave us:
In message <hrf8jvgo7l75c8e4dske77bm9ci8vqsjlh@4ax.com>, DarkMatter
<DarkMatter@thebarattheendoftheuniverse.org> writes
I have about 2.5 Lbs of the metallic form. I used to use it to
stage interesting photographs of heavy objects "afloat". I do know
that it will give off poisonous fumes when heated. I didn't know that
metals, or mercury had a Reid Vapor Pressure though. Interesting fact
there.
I don't know about Reid, but every liquid has a vapour pressure, and
mercury has a pretty high one, even at room temperature.
Yes, and "Reid Vapor Pressure" is what it is referred to IIRC. Seal
a liquid in a pressure vessel at ambient, and take a reading after a
given settling time. You can calibrate your gauges to it, literally.
Freon 12 had the neat pressure of 72 psi at 72 degrees on a "full
tank" of it.
Did you never
see the demonstration where you shine a mercury-vapour UV light on a
fluorescent screen, then put a pot of mercury between them and watch the
billowing clouds of vapour on the screen?.
Nope. Did you stand too close to it? :] J/K.... hahahaha...
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| User: "DarkMatter" |
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| Title: Re: The force of mercury |
08 Aug 2003 09:37:16 AM |
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On Fri, 08 Aug 2003 13:19:29 GMT, The Ghost In The Machine
<ewill@sirius.athghost7038suus.net> Gave us:
Dentist no longer use mercury in fillings, AFAIK. (If they ever did.)
They used silver powder amalgamated with mercury. They place it in
the cavity, and then shove or squeeze out the mercury, leaving only
the silver powder in your tooth. Silver will fuse onto itself if it
is free enough of oxides. Viola! A hard, metallic "filling" is made.
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| User: "Double-A" |
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| Title: Re: The force of mercury |
08 Aug 2003 02:40:53 PM |
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The Ghost In The Machine <ewill@sirius.athghost7038suus.net> wrote in message news:<fsgc01-eip.ln1@lexi2.athghost7038suus.net>...
In sci.physics, Double-A
<double-a@hush.com>
wrote
on 7 Aug 2003 19:43:53 -0700
<79094630.0308071843.7ca93a5e@posting.google.com>:
"Mich" <michelpl.nospam@xs4all.nl> wrote in message news:<3f32ca8b$0$49107$e4fe514c@news.xs4all.nl>...
I have this device in front of me, which exists out of a bulb, a line, and
at the other end a little cylinder thingy.
The cylinder thingy will move, whenever the temperature of the bulb changes,
but the force the cylinder has to deliver is guiet significant (about 60N)
Now, mercury is not allowed anymore here in the EU, so i have to replace
this device with something else, so i thought about using a different
filling, but the manufacturer states that another filling is not an option,
because other fillings can not deliver the force which mercury can.
I thought just by using a different filling, such as alcohol, it would just
work.
Where am i lossing out?
Whats up with the 'force' of mercury.
Which property of mercury defines the force it can deliver? I couldn't think
of any.
Mark
If handling mercury were as dangerous as these alarmist political
do-gooders who are outlawing it everywhere would have you believe, all
dentists would be suffering from chronic mercury poisoning!
Dentist no longer use mercury in fillings, AFAIK. (If they ever did.)
Double-A
Oh yeah? When I was a kid my dentist gave me some mercury to take
home and play with! (GASP!!!)
Double-A
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| User: "Double-A" |
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| Title: Re: The force of mercury |
09 Aug 2003 01:53:31 AM |
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(Double-A) wrote in message news:<79094630.0308081140.11defff5@posting.google.com>...
The Ghost In The Machine <ewill@sirius.athghost7038suus.net> wrote in message news:<fsgc01-eip.ln1@lexi2.athghost7038suus.net>...
In sci.physics, Double-A
< >
wrote
on 7 Aug 2003 19:43:53 -0700
<79094630.0308071843.7ca93a5e@posting.google.com>:
"Mich" <michelpl.nospam@xs4all.nl> wrote in message news:<3f32ca8b$0$49107$e4fe514c@news.xs4all.nl>...
I have this device in front of me, which exists out of a bulb, a line, and
at the other end a little cylinder thingy.
The cylinder thingy will move, whenever the temperature of the bulb changes,
but the force the cylinder has to deliver is guiet significant (about 60N)
Now, mercury is not allowed anymore here in the EU, so i have to replace
this device with something else, so i thought about using a different
filling, but the manufacturer states that another filling is not an option,
because other fillings can not deliver the force which mercury can.
I thought just by using a different filling, such as alcohol, it would just
work.
Where am i lossing out?
Whats up with the 'force' of mercury.
Which property of mercury defines the force it can deliver? I couldn't think
of any.
Mark
If handling mercury were as dangerous as these alarmist political
do-gooders who are outlawing it everywhere would have you believe, all
dentists would be suffering from chronic mercury poisoning!
Dentist no longer use mercury in fillings, AFAIK. (If they ever did.)
Double-A
Oh yeah? When I was a kid my dentist gave me some mercury to take
home and play with! (GASP!!!)
Double-A
And then there was Mercurochrome. It was what the school nurse would
always put on our cuts and scrapes that we got out on the playground.
25% Mercury! But they knew what was best for us. Now it's illegal!
Double-A
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| User: "Uncle Al" |
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| Title: Re: The force of mercury |
07 Aug 2003 05:39:35 PM |
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Mich wrote:
I have this device in front of me, which exists out of a bulb, a line, and
at the other end a little cylinder thingy.
The cylinder thingy will move, whenever the temperature of the bulb changes,
but the force the cylinder has to deliver is guiet significant (about 60N)
Now, mercury is not allowed anymore here in the EU, so i have to replace
this device with something else, so i thought about using a different
filling, but the manufacturer states that another filling is not an option,
because other fillings can not deliver the force which mercury can.
I thought just by using a different filling, such as alcohol, it would just
work.
Where am i lossing out?
Whats up with the 'force' of mercury.
Which property of mercury defines the force it can deliver? I couldn't think
of any.
It's a problem in physical chemistry/physics (dV/dT) including
compressiblity of the liquid and its linear thermal coefficient of
expansion (LTCE). As mercury is single spherical atoms, the liquid is
efficiently packed and therefore rather incompressible.
Try water. Hydrogen bonding rigidifies its structure.
gallium (75.5 wt-%)-indium (24.5 wt-%) eutectic, mp 15.7 C, d=6.250
g/cm^3, slowly tarnishes in air.
http://www.crystalresearch.com/crt/ab34/1129_a.pdf
http://www.physics.ubc.ca/~birger/313p1/
http://www.zae-bayern.de/ectp/abstracts/vichutinsky5.html
http://www.chemicalprocessing.com/Web_First/cp.nsf/ArticleID/NJEC-4ZLPRC/
(table at end)
(check the numbers. Mercury is especially suspect.)
Stuff LCTE x10^3
-------------------
Water 0.35 (increases with temp)
Hg 0.181
GaIn 0.1065
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
"Quis custodiet ipsos custodes?" The Net!
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| User: "Mich" |
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| Title: Re: The force of mercury |
10 Aug 2003 04:08:00 AM |
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"Uncle Al" <UncleAl0@hate.spam.net> wrote in message
news:3F32D527.2F8E7773@hate.spam.net...
Mich wrote:
I have this device in front of me, which exists out of a bulb, a line,
and
at the other end a little cylinder thingy.
The cylinder thingy will move, whenever the temperature of the bulb
changes,
but the force the cylinder has to deliver is guiet significant (about
60N)
Now, mercury is not allowed anymore here in the EU, so i have to replace
this device with something else, so i thought about using a different
filling, but the manufacturer states that another filling is not an
option,
because other fillings can not deliver the force which mercury can.
I thought just by using a different filling, such as alcohol, it would
just
work.
Where am i lossing out?
Whats up with the 'force' of mercury.
Which property of mercury defines the force it can deliver? I couldn't
think
of any.
It's a problem in physical chemistry/physics (dV/dT) including
compressiblity of the liquid and its linear thermal coefficient of
expansion (LTCE). As mercury is single spherical atoms, the liquid is
efficiently packed and therefore rather incompressible.
Try water. Hydrogen bonding rigidifies its structure.
gallium (75.5 wt-%)-indium (24.5 wt-%) eutectic, mp 15.7 C, d=6.250
g/cm^3, slowly tarnishes in air.
http://www.crystalresearch.com/crt/ab34/1129_a.pdf
http://www.physics.ubc.ca/~birger/313p1/
http://www.zae-bayern.de/ectp/abstracts/vichutinsky5.html
http://www.chemicalprocessing.com/Web_First/cp.nsf/ArticleID/NJEC-4ZLPRC/
(table at end)
(check the numbers. Mercury is especially suspect.)
Stuff LCTE x10^3
-------------------
Water 0.35 (increases with temp)
Hg 0.181
GaIn 0.1065
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
"Quis custodiet ipsos custodes?" The Net!
Thank you UnclaAL,
Water won't do the job for me, coz it will be used between -25C to + 25C,
but at least you gave me some points to start with.
I'm not sure if i will ever fix my problem, but at least i have a few hints.
Thank you again,
Mich
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