Thanks for asking your question here. I hope this response provides clarity. Feel free to ask additional questions. The moment resulting from the two forces about point O is 376 lb-ft counterclockwise.
Answer:
1.43 x 10¹⁷.
They will move away from each other.
Explanation:
The force acting on each charged sphere is determined as F = mass x acceleration
= 8.55 x 10⁻³ x 25 x 9.8
= 2.095 N
Assuming Q is the charge on each sphere
F = 
Using the values, 2.095 = 
We find that Q² = 
Thus, Q = 2.289 X 10⁻⁶
The quantity of electrons = Charge / charge of a single electron
= 
=1.43 x 10¹³.
They will accelerate away from each other.