A basketball bounces across the floor. If it has a gravitational potential energy of 70 Joules at its maximum height, what is the maximum height that it reaches? (A regulation basketball should have a
mass of 0.62kg and a diameter of .24 meters)

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.