Date: Mon Apr 30 17:57:19 2007

Author: Dennis C. Henry

Subject: Thanks for the Archimedes suggestions

Post:
Tappers,

Steve Mellema and I appreciate very much the many useful and
interesting postings on implementing the variable-density fluid for
this experiment. Thanks for your quick and tapper-standard help!

Dennis

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>From: "Dennis C. Henry"
>Subject: [tap-l] Archimedes with variable-density liquid
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>Tappers,
>
>A colleague has asked for suggestions on a demonstration/experiment
>that shows how an object with density less than water (or another
>liquid) floats with noticeably varying fractions exposed as one
>varies the density of the liquid in real time. He thought about
>adding salt to water while watching a piece of plastic or other
>"bobber" rise a measurable amount. I don't know how easy it is to
>get salt to dissolve in progressively saltier water, particularly
>without stirring or heating. Of course, if one moves the object
>from one container to another of liquids of different densities, it
>is easy to see the effect of fluid density. I suggested the
>Cartesian diver as a related demonstration, and this may be closer
>to his objective of dealing with the effects of less obvious forces.
>
>Dennis
>
>Dennis C. Henry Office Location: 213 Olin Hall
>Professor and Chair of Physics Office phone: (507) 933-7314
>Gustavus Adolphus College Office fax: (507) 933-6104
>800 West College Avenue Home phone: (507) 931-2784
>St. Peter, MN 56082-1498
>e-mail: dchenry@gac.edu http://physics.gac.edu/~dchenry/

Dennis C. Henry Office Location: 213 Olin Hall
Professor and Chair of Physics Office phone: (507) 933-7314
Gustavus Adolphus College Office fax: (507) 933-6104
800 West College Avenue Home phone: (507) 931-2784
St. Peter, MN 56082-1498
e-mail: dchenry@gac.edu http://physics.gac.edu/~dchenry/



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