11. The coefficient of restitution , for all its multisyllabic heft, is nothing more than a term scientists use to talk about bounciness. 12. A perfectly elastic collision has a coefficient of restitution of one; a perfectly inelastic collision has a coefficient of restitution of zero. 13. _Ball squishiness : Under major league standards, a ball's " coefficient of restitution " can vary about 6 percent from a standard. 14. A perfectly elastic collision has a coefficient of restitution of one; a perfectly inelastic collision has a coefficient of restitution of zero. 15. They are tightly bunched at sort of the high end of coefficient of restitution specifications, but they have been for some time. 16. They must stay within the Coefficient Of Restitution ( COR ) limit of 0.83, which measures how a ball hits off the surface. 17. Lab technicians measure the coefficient of restitution , calculated by dividing the outgoing velocity of the ball by 58 . 4 miles per hour. 18. When all the ciphering for the true coefficient of restitution had been done, the new golf ball bounced back with a kangaroo-style . 890. 19. "Because the coefficient of restitution is so high, the surface is very firm, so you get a pounding kind of injury, " Gay said. 20. This was also the first year in which the new BBCOR Composite baseball bat ( Batted Ball Coefficient of Restitution ) standard was ushered-in.