Fisherman is pulling the net with a force of 200N. (1)What are the forces acting on the fisherman? (2)What are the reaction to these forces?

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is

Frank just graduated from eighth grade. assuming exactly four years from now he will graduate from high school how many seconds does he have until his high school graduation

In a hydrogen molecule there are a total of four charges, 2 protons in the two nuclei, and 2 electrons. how many unique charge-pairs are there (without double counting)?