[ExI] Quantum gravity

[John Clark]

On Thu, Sep 17, 2020 at 11:15 AM Anton Sherwood via extropy-chat <
extropy-chat at lists.extropy.org> wrote:

>> On 2020-9-16 18:15, Stuart LaForge via extropy-chat wrote:
>> > relativistic mass-energy equivalence predicted nuclear forces account for
>> the majority of the mass of an atom
>
>
> * > Majority? That doesn't seem right; then the relation of mass to number
> of nucleons ought to be less linear than it is.*
>

One AMU is defined as exactly 1/12 the mass of a carbon 12 nucleus which
consists of six protons and six neutrons, but the mass of a free
independent Proton that is not bound to anything else is 1.007276 AMU and
for a Neutron it's 1.008665 AMU, and obviously 12 of those don't add up to
exactly 12 AMUs. The difference is in the binding energy, the energy you
would need to break apart a carbon 12 nucleus and produce 12 independent
particles, and the energy you would release if you joined up those 12
independent particles to produce a carbon nucleus. It's the reason the
fusion of elements lighter than Iron produces energy, it's what powers the
stars.

John K Clark
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