A metal dome has an electric field surrounding it, with the electric field pointing to the right of 6.5x106 N/C at a certain location. An unknown charge is then placed at this location. What will be the type and size of this unknown charge if it feels a force of 10250 N to the left?

That would be kinetic energy

Answer(a)   the matererials that are in contact, the two materials and the nature of their surfaces/// (b)/// the force pushing the two surfaces together, pushing the surfaces together causes the more of the asperities to come together and increases the surface area in contact with each other