Date: Wed Feb 28 11:44:52 2007 Back to Contents

Author: Santos Ramirez

Subject: Demos that use mercury

Post:
I also recall another demo that used mercury.
It was a small copper disk, that would rotate on a horizontal
axis. Part of bottom of the disk would rest in a trough of
mercury. Details are a little sketchy, think it was
an eddy current demo. Do you have that one too?

(I changed the subject line since this is getting away
from the "lab guy" topic)

Santos


> I have one of those on shelf somewhere, It also had the cup of Hg, and
> a center post. Put current from a hanging wire and the wire would
> rotate, I believe this was Ampere's or Oersted's experiment.
>
> Don't have the guts to fire it up. The Hg has been stored and the cups
> etc amalgamated to get an residual Hg.
>
> dave
>
> David A Kardelis, Ph.D.
> College of Eastern Utah 435-613-5125
> 451 E 400 N 435-613-5996 (Fax)
> Price, UT 84526
>
> -----Original Message-----
> From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] On
> Behalf Of Santos Ramirez
> Sent: Wednesday, February 28, 2007 8:42 AM
> To: tap-l@lists.ncsu.edu
> Subject: Re: [tap-l] LabGuy Rot Suggestions
>
> Talk about mercury vapor....
>
> Brings to mind
> a demo that consisted of a mounted vertical spring that had one
> end dipped in a mercury cup. A current was run through
> the spring and the mercury, causing the spring to contract.
> The end of the spring would lift out of the mercury, breaking
> the circuit. The spring would then drop, re-starting the process.
> You could see the vapor.
>
> Wonder if this is in a museum somewhere?
>
> Santos
>
>
>
>> "I'm doing asbestos I can!"
>>
>>
>> On Feb 27, 2007, at 12:12 PM, Sam Sampere wrote:
>>
>>> More for labguy rot...
>>>
>>> 'dems only mercury vapors. Don't need no stinkin' respirator.
>>>
>>> A little asbestos dust won't hurt ya.
>>>
>>> Get shocked by those open contacts once and you'll learn never to
>>> touch
>>> them again.
>>>
>>> Cough cough cough.
>>>
>>> Sam
>>>
>>> -----Original Message-----
>>> From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-
>>> owner@lists.ncsu.edu] On
>>> Behalf Of Santos Ramirez
>>> Sent: Tuesday, February 27, 2007 12:25 PM
>>> To: tap-l@lists.ncsu.edu
>>> Subject: Re: [tap-l] LabGuy Rot Suggestions
>>>
>>> Bill,
>>>
>>> I think this list better reflects a "lab guy"'s requirements
>>> than someone that needs to quit. :) Might fit on a T-shirt. SR
>>>
>>>
>>> Could call it:
>>>
>>>
>>> YOU ARE A "LAB GUY" IF ...
>>>
>>>> A: Knows the location of everything in the Demo Room-- or at least
>>>> where it /was/ before someone borrowed it.
>>>>
>>>> B: Has every published edition of Halliday and Resnick.
>>>>
>>>> C: Personally knew Sutton.
>>>>
>>>> D: Knows the meaning of the the acronym "PIRA".
>>>>
>>>> E: Can set up any demonstration in any lecture hall on campus in 10
>>>> minutes flat. And is frequently asked to do so at the last
> minute...
>>>>
>>>> E: Has at least 195 of the "PIRA 200" demonstrations in their
>>>> department collection.
>>>>
>>>> F: Can explain even the most basic demonstrations to the most
>>> advanced
>>>> professors.
>>>>
>>>> G. Can recall the last dozen bars visited with Ziggy during AAPT
>>>> meetings. 10? 6? 1??
>>>>
>>>> Cheers.
>>>>
>>>> bill
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>
>>
>
>
>
>



From tap-l-owner@lists.ncsu.edu Wed Feb 28 11:44:52 2007

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