A ball with a mass of 1.5 kg strikes a wall with a velocity of 4.5 m/s to the left. The ball bounces off the wall with a velocity of 3.5 m/s to the right. If the ball is in contact with the wall for 0.20 s, what is the impulse delivered to the ball?

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.