Aball has a mass of 0.25 kg and is moving to the right at 1.0 m/s. it hits a ball of mass 0.15 kg that is initially at rest. after the collision, the 0.15 kg ball moves off to the right with a velocity of 0.75 m/s. what is the final velocity of the 0.25 kg ball?

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b. b. at twice the distance, the magnitude of the field is 2b. c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.