A 10.0-kg bowling ball sliding across a frictionless surface, with a velocity of 3.00 m/s, collides head-on with a stationary 9.00-kg bowling ball. The collision is perfectly elastic, sending the 9.00-kg ball sliding away and leaving the 10.0-kg ball with a velocity of 0.156 m/s. What is the speed of the 9.00-kg ball after the collision