Question

How far apart the two electrons be if the force between them equals the weight of an electron ? What in case of protons ?

Answer 1

let r distance between two electrons .

F = Force exerted by one electrons to other

F = Ke²/r²

weight of electron = mg

a/c to question ,

F = mg

Ke2/r² = mg

9×10^9 × {1.6 × 10^-19 }²/r² = 9.1 × 10^-31 × 10

r² ={ 9 ×2.56/9.1 } × 10^-38+30+9

= 25.31

r = 5.03 m