The electrostatic interaction seems to be relatively weak on macroscopic objects

Question

The electrostatic interaction seems to be relatively weak on macroscopic objects. On the pith ball there were only 109 extra electrons for about 1022 atoms in the pith ball, or 1 charge per ten trillion atoms. That is why the force appeared weak.

On molecular or atomic size scales, the electric charge determines everything because there is about one charge per atom.

Estimate the force between a proton and an electron at the Bohr radius of 0.5Å (1 Å=10-10 m). The magnitude of the charge of an electron, as well as a proton, is 1.6·10-19 C.

Explanation / Answer

the magintude of force between a proon and an electron is: F=k.|e|.Qproton/(Rbohr)^2= 1843.2(N)

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