Re: Buoyancy and Wood
- From: "Greg Neill" <gneillREM@xxxxxxxxxxxxxx>
- Date: Sat, 7 Apr 2007 10:54:02 -0400
"W. Watson" <wolf_tracks@xxxxxxxxxxx> wrote in message
news:rwDRh.1791$Q23.1364@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
I want to make a buoynacy demo with a substance whose density is similar to
wood but does not crack easily. I'm thinking of something on the order of
6x6x3(4)" on a side. Wood of this size cracks easily. I suppose I could
paint it, but it but I think it would still dry out.
I'm looking for a buoyant block of something that can be made into some
reasonable fraction of a cubic foot. Factors would be 2, 3, 4 and 6. For
whatever blocks I use, I want it be fairly easy to express its volume as
simple fractions between 0 and 1 of these factors. 1/4, 2/3, 1/27, 1/36,
1/8, ... Cost should be also somewhat like wood, and somewhat easily
available.
Any water tight containers with suitable ballast
will do, no? For example, jars with lead shot
ballast to trim the overall density.
.
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