Re: [Phys-l] [tap-l] density

[chuck britton <britton@ncssm.edu>]

I've made 'Lab Masses' from cement filled soda canes (Coke cans, here  
in the south - regardless of manufacturer)

To get varying masses you could preload each can with foam 'peanuts'  
before adding the cement/plaster.

Do you want densities > water or less?
That might determine foam vs cement.

You WILL have foam to trim after it has oozed out the top of the can.

On Oct 6, 2008, at Oct 6(Mon) 7:00 , Bernard Cleyet wrote:

> Instead of foam, how about plaster;  not messy and cleans up w/
> water.  Dense, so use rather fewer washers.
>
> bc taught by a santa Barbara Nat. History museum worker how to
> accelerate and retard setting time. [ca. 1970]