Question: Conceptual Example 20.1 shows that the gravitational force between an electron and a proton is about 10 -40 times weaker than the electric force between

Conceptual Example 20.1 shows that the gravitational force between an electron and a proton is about 10^-40 times weaker than the electric force between them. Since matter consists largely of electrons and protons, why is the gravitational force important at all?

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