Re: [Phys-l] Buoyancy.

[Brian Whatcott <betwys1@sbcglobal.net>]

I'll take a punt:
For the energy exchange  between  a relatively small inertial mass 
moving quickly,
and this same treacherous small gravitational mass  factored with a relatively
large height change,  and given that the increased buoyancy associated
with colder Winter environments effectively attenuates the gravitational
 force g, tending to decrease the beat while  it decreases the pendulum's
length tending to increase the beat: why should I not claim then,
that the L/g ratio is more constant with temperature variation and
its associated density variation for larger swing amplitudes?

(This is called arguing from a plausible need  :-)

Brian


At 01:59 PM 4/11/2008, bc, you wrote:
> I've thought about this a bit and don't understand how a large arc
> mitigates atmospheric buoyancy effect on the pendulum's period.
>
> bc maybe's had it
> On 2008, Apr 09, , at 13:54, Peter Jordan wrote:
>
> > John Harrison used a grasshopper with a large pendulum arc in his
> > wooden regulator clocks as a means of minimising the effects of
> > changes in air density on the pendulum.


Brian Whatcott    Altus OK    Eureka!