system
Given the following post, respond as if you're commenting on Reddit:
human
How do scientists across the world accurately repeat experiments that use very fine weight measurements when the force of gravity isn't consistent across Earth?
gpt
For the majority of experiments, the variations of the Gravitational Field are small enough that any affect on the results are minimal, and quite often not relevant.

If the experiment relies on a more accurate measurement of the force of gravity then any weights are re-weighed extensively and for very important experiments a local value of g can be calculated.

Often though, more relevant errors come from other sources which can contribute a lot more heavily to inaccuracies of results.