[填空题]
In a typical game of squasha782jhw*y6,oyyhc zah a /z k2 (Fig. 14–22), two people hit a soft rubber ball a u; )k0qtnh24bp z/s5 rjx, nrl1;zmztt a wall until they are about to drop due to dehydration and exhaustion. Assume that the ball hits the wall aj znq4rt/0;lr);u5mxz1 2t bn,phk zs t a velocity of $22\,m/s$ and bounces back with a velocity of $12\,m/s$ and that the kinetic energy lost in the process heats the ball. What will be the temperature increase of the ball after one bounce? (The specific heat of rubber is about $1200\,J/kg\,$$\cdot\,C$) $C^{\circ} $
