The electrostatic interaction seems to berelatively weak on macroscopic objects.

Question

The electrostatic interaction seems to berelatively weak on macroscopic objects. On the pith ball there wereonly 109 extra electrons for about 1022 atomsin the pith ball, or 1 charge per ten trillion atoms. That is whythe force appeared weak.

On molecular or atomic size scales, the electriccharge determines everything because there is about one charge peratom.

Estimate the force between a proton and an electronat the Bohr radius of 0.5Å (1 Å=10-10 m).The magnitude of the charge of an electron, as well as a proton, is1.6·10-19 C.

Fhydrogen =

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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