Yes it does due to the variation of gravitational attraction between the
object and the Earth with height above the ground.
However this classical effect is very small and probably virtually
impossible to measure.
Bruce
Gerard PG5G wrote:
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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