Question

How far apart should 2 electrons be if the force between them is equal to the weight of an electron?

Answer 1

Answer:

Explanation:

k e^2 / r^2 = m g  

r = e [k / (m g)]^1/2  

then  

1) r = 1.6x10^-19 [9x10^9 / (9.1x10^-31*9.8)]^1/2 = 5.08 m [electrons]  

2) r = 1.6x10^-19 [9x10^9 / (1.67x10^-27*9.8)]^1/2 = 0.12 m [protons)

Answer 2

ke^2 / r^2 = m g

r = e [k / (m g)]^1/2

1) r = 1.6x10^-19 [9x10^9 / (9.1x10^-31 ×9.8)]^1/2 = 5.08 m [electrons]

2) r = 1.6x10^-19 [9x10^9 / (1.67x10^-27×9.8)]^1/2 = 0.12 m [protons].

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