Place two 1.0 Kg masses one meter apart and the
attractive gravitational force Fg between them will be
Fg = 6.67e-11 ^ M1 * M2/R^2 = 6.67e-11 Newtons.
Place two "spheres of energy:" each with c^2 ( 9e16 )joules of energy
one meter apart and the attractive force between them will be:
Fg = 6.67e-11 = k * E1 * E2?R^2 Newtons
Thus, K = 8.23e-45
Fg = 8.23e-45 * +/- E1 * +/- E2/R^2 = 8.23e-45 Newtons
Attractive Force, if Both are of the Same Energy Sign
Repulsive Force, if They are of Opposite Energy Sign.
IOW,, the Protons (Positive charges) = Positive Energy in the "Spheres of Energy"
attract each other as do the Electrons (Negative charges) = Negative Energy
even though the Electrons in each sphere Repel the Protons in their
own sphere, but the approximately 40 orders of magnitude
Stronger Electrostatic Force swamps this repelling gravitational force.
Prediction:
2.20 Joules of energy stored between the plates of a vacuum capacitor
(Evacuated-Closed Concentric Spheres or Cylinders) At The Earth's Surface
1, Will Repel the Earth with a force of 2.40e-16 Newtons.
2, An electron (mc^2 = 8.19e-14 joules) at the earth's surface
should be repelled by a force of 8.9e-30 Newtons.
The latter case can be easily verified by experiment.
One wrong step using the calculator can start a " Wild Goose Chase". :-)
Fred

