Two protons are about 10^-10 m apart.Their relative motion is chiefly determined by: A)gravitational forces B)electrical forces C)nuclear forces D)magnetic forces E)torque due to electric dipole moments

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The electrical forces (Coulomb forces) are the dominant forces at this distance due to the repulsion between the positively charged protons. Gravitational forces are negligible compared to electrical forces at this scale.

Two Protons Are About 10-10 M Apart

Two Protons Are About 10^-10 M Apart