@johncarlosbaez
(1) If you weigh the gold first, assuming that the abundance of ¹⁴C in the feathers is significantly greater than that of unstable isotopes within the gold, then the gold will appear to come out on top as some carbon will have decayed.

(2) It depends upon their arrangement. e.g. given a sphere of gold and a 'sphere of feather' resting on a surface at the same altitude, a larger proportion of the feathery material will be experiencing less 'gravitation force'.

#HopeThisHelps

@cmconseils
No there isn't.
The picture shows the Zhuozhou system of 25 toll gates designed to continuously absorb the capacity of the essentially four lane expressway between Beijing and Hong Kong.
If they only had four toll booths it wouldn't really work, would it?

#HopeThisHelps #FakeNews #roads