If you were trying to kill a fish with a spear, would you aim where you see the fish

Does the earth behave like a magnet how do you prove it

Mary starts from her house, walks 80 meters south, and stops to chat with her aunt on the sidewalk. after chatting for a few minutes, she walks 125 meters to the west to meet a friend and then walks 45 meters north with her friend to a cafe for lunch. overall, she takes 10 minutes to do all this. what is mary’s average speed?

Meaning of a nonzero y-intercept to a graph of reaction distance versus speed