Calculate the electrostatic force when one of the balloons is reduced to 2×10^-9 C and held at a separation distance of 2 m! please help☺️

Which statement best describes who the period and frequency of electromagnetic was change between gamma rays and microwaves? a) the period and frequency stay the same. b) the period increases and the frequency decreases. c) the period decreases and the frequency increases. d) the period increases and the frequency increases.

Plss anybody know how to do this? ? i need the answers from a through d

Protons and neutrons are found within the nucleus of an atom