Date: Wed Feb 28 14:55:44 2007 Back to Contents

Author: Santos Ramirez

Subject: Re: Demos that use mercury

Post:

I believe I have seen a disk that rotates when placed on
the ring launcher (somewhere).

The sphere on the HG that you mentioned, do you place it
on top of the ring launcher to get it to spin?

When I place a sphere on top of the ring launcher,
I usually put it on a large watch glass and "shade" it
with an aluminum plate.





> I do, it doges with ring launcher coil, also have sphere that sit in
> pool of HG that is supposed to spin.
>
> 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 9:38 AM
> To: tap-l@lists.ncsu.edu
> Subject: [tap-l] Demos that use mercury
>
> 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 14:55:44 2007

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