[填空题]
What is the angular momentum of a 0.210-kg ball rotating dva3j q- gt nwc4yfo:cj9h8k()lp0h 4 on th5418 t/fwcz0us 8 cgnm.l0( hiulnjsde end of a thin string in a circle of radius 1.10 m at an angular speed 5f0snmjug 8 .wlthzcc 8/u0(1i4d nl sof 10.4 $rad/s$? $kg \cdot m^2$