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Re: summary of weight



At 08:25 10/17/99 -0400, you wrote:
In a message dated 10/16/99 11:46:45 PM Central Daylight Time,
inet@INTELLISYS.NET writes:

Einstein's triumph was to say: the identity of effects is no accident:
they are the SAME effect - inertial acceleration - one caused by an
external force, the other caused by a strange effect that mass and
space have on each other that feels like acceleration to objects in
the vicinity.

Brian,

But, on Earth, with all Earthly resources at my disposal, and when measuring
an accelerating object, can I differentiate the causes and place them into
categories with one category being weight? Or is this simply impossible to
do?

Bob

A modern method of measuring the acceleration due to gravity is
to drop a reflector - a corner cube perhaps, down a vacuum column.
Measures of displacement and time are exceptionally refined when
counting fringes of coherent light as you know.

Splitting out the contribution due to Earth rotation and that
due to mass attraction involves comparative experiments at the
instantaneous axis of rotation (the poles). Unfortunately one
needs to handle the oblate change in geometry along with spin.
(This can lead to paradoxical observations like the uphill river
mentioned this morning by Paul...)

Buoyancy is greatly reduced depending on the quality of the vacuum.

Masscons can be measured in prior satellite surveys.

As far as I know, this is far as the experimentalist can easily go in
segregating components of g. There is also the issue of space time
warping measures of time and distance it is true, but I will stay
silent on the several flavors of small corrections that need to be
applied.

Respectfully,

brian whatcott <inet@intellisys.net>
Altus OK