These are your points you get for doing pacifist also can i get some ketchup

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

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?

It is really hard for me right know