[time-nuts] nubie querie

[Gerard PG5G]

Eh, does the weight change if the sand runs from top to bottom? Some 
quantum mechanic effect I am missing? Or maybe a change in gravity as 
the sand drops from high to low?

phil wrote:
>>> Even defining when the sand timer is "done" is not a real
>>> simple thing. Waiting for that very last particle to drop may
>>> not be the best approach.
>>> Bob
>
> You could measure of the weight of the hourglass.
> Phil
>
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