So.. what if the number of quarks determines the shape of spacetime, instead of the amount of mass?
In this case.. gravity's correlation with mass would be due to the correlation between number of quarks and mass.
We could differentiate between gravity determined by number of quarks and gravity determined by mass with a scale and an accelerometer.
Inertial mass doesn't change acceleration due to gravity in this scenario: acceleration is determined by the number of quarks. Weight is still mass * acceleration, but mass isn't what determines acceleration.
111 *10^30 quarks will create a certain acceleration, whether the object has greater total mass or not (due to the amount of neutrons in and binding energy of the object's nuclei).
I imagine a slightly different type of Cavendish experiment, with a second set of smaller balls exactly pi/2 from the other small balls, with the second set of balls the same (very close) mass as the first balls, but containing a different amount of total particles.
Set the 'torsion balance' up so that at rest (without the 4 smaller balls), the big balls lie exactly aligned between the 2 different types of smaller balls that have the same mass, but differing amounts of particles.
The big balls will stay in the same place if the gravitational attraction is exactly the same for equal masses that have a different number of particles.
If despite the fact that the masses of the small balls are the same, there is a difference in gravitational attraction, we know we either have experimenter error, equipment error, a dark matter asteroid passed through us as we conducted the experiment, an evil telekinetic dinosaur is pranking us, or maybe the number of particles is what determines gravitational attraction, and gravity's correlation with mass was just because of the close correlation between number of particles and mass (and nobody checked, because we habitually just assumed the mass-gravity connection was correct, without trying to figure out other stuff, because it's what we were taught... by authority figures... that we don't question... because we're complacent little brainwashed sheep who don't question authority unless our peer group does.. and nobody questioned the mass/gravity connection (unless someone did)).
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That neither fast nor myself understand what 0 Kelvin means.
The answer is no, the electrons don't stop. At zero Kelvin, entropy equals zero, which doesn't mean electrons stop moving... just that toddlers will stop throwing stuff all over the place.
Ok, well hurry the fuck up and freeze Trump and Palin before shit gets outta hand.