[填空题]
A 0.40-kg ball is thrown with a speed of 12 m/s at an angle o0 * av2kaivlqz (k r00moy,zkau))uu(mtd 4c gyrew.w7czecfi,n;3.6 w p4w(f 33 $^{\circ} $. (a) What is its speed at its highest point m/s
(b) how high does it go? (Use conservation of energy, and ignore air resistance.) m