How do we show our work for it ?

Two identical 82 mg dust particles very far apart (pee 0) are moving directly toward each other at a speed of 3698 m/s. the charge on each is-719 ? c. determine how close they will get to each other. let k = 9x109 n-m2/c2 & ignore gravity.

Which notation is used to represent an alpha particle? a. b. c. d.

Who was the first scientist to measure speed as distance over time?