A 250g steel ball and a 500g steel ball each hang from 3.0-m-long strings. At rest, the balls hang side by side, barely touching. The 250g ball is pulled to the left until the angle between its string and vertical is 23 degrees. The 500g ball is pulled to a 23 degrees angle on the right. The balls are released so as to collide at the very bottom of their swings. To What angle does each ball rebound?