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On Fri, 09 Oct 1998 11:12:16 -0500 "Tim Folkerts"
<tfolkert@bigcat.fhsu.edu> >
If my
Why not use a hollow tube and run water through it? . The
temperature can be changed within seconds by turning on the other tap!
rough estimates are right, even with tap water at 140F = 60C andmm, which you can easily measure with your favorite technique.
68F=20C, a one meter tube would expand about (1 m)(0.000025/C)(40 C) = 1
Very good thought but-----
1) Most schools do not have running hot tap water in addition to the cold
tap water at their lab and demo tables.
2) It is doubtful that you could measure a short distance of 1 mm with an
error of 10% or less with your "favorite technique". However if you have
time to try this with your 1 meter long pipes of brass, copper, iron,
aluminum and ??? I would be very interested in the results.
This would make another good student investigation!
Herb Gottlieb from New York City
(Where we are "from Missouri" when it comes to doubting)