Afootball punter accelerates a football from rest to a speed of 15 m/s during the time in which his toe is in contact with the ball (about 0.23 s). if the football has a mass of 0.45 kg, what average force does the punter exert on the ball

What happens to light waves from a star as the star moves away from earth?

What happens when chlorine reacts with bromine? a. electrons move from the chlorine atoms to the bromine atoms. b. electrons move from the bromine atoms to the chlorine atoms. c. electrons are shared between the chlorine atoms and the bromine atoms. d. electrons become delocalized among the atoms.

Erosion of the beach is normally a slow process. however, in certain situations, large chunks of shore may wash out to sea. what could cause this to happen?