Maybe you can divide the volts its twelve if you do that but itll show you how much to double it by
KE=1/2 mv²
= 1/2 × 70 × (6)²
= 1260
Speed = frequency * wavelength
The size of the force varies inversely as the square of the distance between the two charges. Therefore, if the distance between the two charges is doubled, the attraction or repulsion becomes weaker, decreasing to one-fourth of the original value.