<span>The inner core is liquid and moving.</span>
Answer:

Explanation:
According to coulombs law force between two charges is given by
here R is the distance between both the charges which is given as 25 cm
We have given force F =0.036 N
So
As
is constant which value is 


Answer:
x=0.53
Explanation:
Using Gauss law the field is uniform so
E=ζ/ε
Charge densities ⇒ζ=1.
ε=8.85

Force of charge is


So finally knowing the acceleration and the time the distance can be find using equation of uniform motion
