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Re: [Phys-l] Rest mass again?

It is my understanding that the sum of the rest masses of 2 up quarks
and a down quark is far less than the mass of a proton and the sum of
the rest masses of 2 down quarks and an up quark is far less than a
neutron so that most of the mass of a proton is from the motion of the
quarks and likewise for a neutron. This leads me to believe that, in
the Standard Model, most of the gravitational effect of stuff made of
protons, neutrons, and electrons is due to the motion of quarks and it
is indistinguishible from the gravitational effect due to the mass of
the quarks.

The wikipedia article on the quark includes the masses of the quarks:

-----Original Message-----
From: [mailto:phys-l-] On Behalf Of Dr. Arnulfo
Castellanos Moreno
Sent: Friday, October 22, 2010 1:54 PM
To: 'Forum for Physics Educators'
Subject: Re: [Phys-l] Rest mass again?

What is the gravitational effect of a mass in motion?

Arnulfo Castellanos Moreno