Gravity is not a constant and that would probably matter at the precision that needs to be measured in the given test environment. In any other situation, gravity (or the state of the earths magnetic field) would generally not matter enough to measure.
The precision of F=MA might even be debatable as an accurate formula at these scales… I dunno about that though.
https://en.m.wikipedia.org/wiki/Gravity_of_Earth
https://earthobservatory.nasa.gov/images/84266/measuring-earths-magnetism
And a also a full vacuum. Your test subject might not look so hot after that, but science!
Speculating, of course, I would say there wouldn’t be enough change to get a perceivable effect through other kinds of noise at the scale we are talking about. Yes, there would be an effect, but with all other environmental variables included, the results may appear completely random.
Then again, I suppose much of this boils down to the accuracy of the tools that you use to measure the results.
No, you had it. It’s J, as is in “jiraffe”.