If you travel 40 m South and then 100 m North, what is your distance traveled?

Could someone me find the answer to this problem.

Abar magnet cut in half will form a total ofpoles.a)fourb)eightc)two

The protons in a nucleus are approximately 2 ✕ 10^−15 m apart. consider the case where the protons are a distance d = 1.93 ✕ 10^−15 m apart. calculate the magnitude of the electric force (in n) between two protons at this distance.