[填空题]
In a typical game of sq(9uu. yiqg;qsthw (e7jw)4j fuash (Fig. 14–22), two peug vq;*is5y +yople hit a soft rubber ball at a wall until they are about to d+;*uy5gv iq syrop due to dehydration and exhaustion. Assume that the ball hits the wall at 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} $
