Strictly speaking, do aggregate bodies "exist"?

[ariich]

I think #2 is not correct.
Quarks are fundamental and different quarks have different mass.

I don't know how small a quark is (I looked it up on wiki, but it was way too difficult to understand). But supposing a quark has a mass of Q, I can concieve of a particle with a mass of Q/2 - half a quark, basically.

Again you can conceive it, but at that fundamental subatomic level, when we say "mass" we don't really mean anything different to "energy". It is of course possible that, say, a quark with mass/energy Q is made up of 2 even smaller entities with mass/energy Q/2. As at now, though, it's not possible to see if that would be the case, because we have not been able to observe them having any dimensions that could be divided up.

[kári]

Also isolated quarks have never been observed so I wouldn't say that they are 'balls' of matter like atoms, protons and electrons are.

[Scheavo]

The issue really comes down to, "what is energy?"

Which I have yet to find a real answer to.

[Ħ]

I think #2 is not correct.
Quarks are fundamental and different quarks have different mass.

I don't know how small a quark is (I looked it up on wiki, but it was way too difficult to understand). But supposing a quark has a mass of Q, I can concieve of a particle with a mass of Q/2 - half a quark, basically.

Again you can conceive it, but at that fundamental subatomic level, when we say "mass" we don't really mean anything different to "energy". It is of course possible that, say, a quark with mass/energy Q is made up of 2 even smaller entities with mass/energy Q/2. As at now, though, it's not possible to see if that would be the case, because we have not been able to observe them having any dimensions that could be divided up.

If you replace the word "mass" with the word "energy," the argument still works.

[Sigz]

It's a meaningless argument. Just because you can imagine something doesn't mean it has any basis in reality.

[Scheavo]

Just realized, we have some reason to think this may not be the case. It's the "quantum" of "quantum mechanics." Orbiting electrons, for instance, have set energy levels, and they can't be at an energy level not allowed.

[Ħ]

Just realized, we have some reason to think this may not be the case. It's the "quantum" of "quantum mechanics." Orbiting electrons, for instance, have set energy levels, and they can't be at an energy level not allowed.

Yeah, that's true. Energy is released by electrons when they fall to a lower energy level.