On a chessboard, a king sits at a position +12cm from the lower left corner. A knight is +5cm from the same corner along the same straight line. What is the displacement from the king to the knight?

Need asap ‼️ 20 pts which gravitational force field diagram is drawn correctly? (answers in pictures below)

The least penetrating form of radiation is

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.