The answer is C,<span> The sum of all forces acting on the object is zero. hope that helps!!</span>
The answer is 100mm/s. I hope this helps :)
I’m pretty sure it’s true x
Okay, haven't done physics in years, let's see if I remember this.
So Coulomb's Law states that

so if we double the charge on

and double the distance to

we plug these into the equation to find
<span>

</span>
So we see the new force is exactly 1/2 of the old force so your answer should be

if I can remember my physics correctly.