What are the three factors that influence the electrostatic force, depending on Coulomb's law?

Describe how the fermi level changes with donor level, temperature and contact with p and n type semiconductors

For which pair of objects would adding the same a

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?