>>11116965>Jar """ weighs """ 1kgdon't you mean """ masses """???
>Flies """ weigh """ 0.5kgThose are some huge-ass flies, OP, to weigh HALF A POUND (approximate)!
Answer:
The scale fluctuates based on whether the flies are flying or have landed somewhere in the jar, and also if they're flying they're causing perturbations of the air inside the jar, and since air has mass and therefore inertia, the scale will fluctuate a small but measurable amount due to those perturbations.
So the answer is: NONE OF THE ABOVE, """ VARIABLE """.
