At the end of a game, a basketball player on the wining team throws the ball straight up as high as he can throw it. what is the basketball's velocity at the top of its path

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples