Electric Charge...

The Electrostatic Force between two charges is 4 N. If one charge has a value of 5 $$\mu$$C and is 2 cm from the second charge, find the new electrostatic force if the second charge is moved 2 cm further away from the first charge.

A charge $$\mathit{q}$$ of mass $$\mathit{m}$$ that is free to move is placed at the origin of a coordinate system.
A second identical charge, but of twice the mass, is placed at a distance $$d$$ along the positive $$x$$ axis from the origin.
Which of the following correctly describes the magnitude and direction of the force acting on the particle at the origin?

The Electrostatic Force between two identical charges $$q_0$$ separated by a distance $$r_0$$ is $$F_0$$. The magnitudes of each charge and the separation distance are tripled. Find the new Electrostatic Force in terms of $$F_0$$.

Coaxial cable (typically used for cable and satellite tv) has its signal run on a copper wire surrounded by an insulator which is surrounded by the ground wire, as opposed to the typical side by side configuration.
What is the most logical reason for this?

Compare how the magnitude of the electric field decreases with distance from a uniform charged sphere and a uniform charged wire.

Two identical conducting spheres were situated so that they were insulated from their surroundings, and their centers were separated by a distance, d.
One sphere had a charge of $$+8$$ Coulombs; the other had a charge of $$-4$$ Coulombs.
The spheres were then brought together to touch each other. The spheres were separated and again insulated from their surroundings, and their centers were separated by a distance d.
How does the magnitude of the electrostatic force between the spheres in their final situation compare to the magnitude of electrostatic force between them in their original situation?

A 1 C charge and a 8C charge experience a force of 180 N.
How far apart are the charges?

If the distance between two unlike poles is doubled then the force of attraction between them becomes ______ times its original value.

______ is that charge which repels an equal and similar charge with a force of $$9\times 10^{9}N$$, when placed in vacuum at a distance of $$1\ m$$ from it.

Two point charges separated by a distance d repel each other with a force of $$10\ N$$. If the separation between them becomes $$d/2$$, the force of repulsion will be ______.