Someone, please talk to me
i am losing my mind and some needs to bring me back to earth

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.

How to tell if a molecule is polar or nonpolar with electronegativity