AVR-Chat

This is exactly why the floaters in a Galilleo's Thermoscope hover at  
a specific depth. There is a density gradient in a column of fluid. At  
a greater depth, the floater is lighter than the fluid it displaces  
and at a lesser depth, it is heaver than the fluid it displaces.  
Definitely a second order effect, but still important.

Jim Wagner

On May 15, 2009, at 4:58 AM, Brian wrote:

>
>
> I was on Submarines in the Navy. They do compress but that is under  
> a couple hundred feet of water. the compression of the plastic ball,  
> could even be solid, should be small and still produce a measurable  
> upforce with depth.
>
> Brian
> --- In AVR-Chat@yahoogroups.com, David VanHorn <microbrix@...> wrote:
> >
> > On Thu, May 14, 2009 at 11:37 PM, dlc <dlc@...> wrote:
> > > Ahem,
> > >
> > >   Water density is a constant, water _pressure_ increases with  
> depth,
> > > and if the ball acts the way my BC does, the air in the plastic  
> ball
> > > loses buoyancy as the water depth increases.  But since my BC  
> compresses
> > > with depth and the plastic ball probably wouldn't, that might  
> not be so.
> > >  These are basics every diver learns.
> >
> > So the effect is smaller, and the slope runs the other way, but it  
> still works.
> > :)
> >
> > Submarines compress, I imagine a plastic ball will too.
> >
> >
> > --
> > There is no computer problem which cannot be solved by proper
> > application of a sufficiently large hammer.
> >
>
>
> 



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