[填空题]
What is the angular momentum of a 0.210-kg balltq b /7 j, w+ejco;asuce4sx*1 rotating on the h(,is*jfoofe84trs xdb 0/ v *end of a thin string in a circle ofs,o o0ds*h /i(rfx f*be8j tv4 radius 1.10 m at an angular speed of 10.4 $rad/s$? $kg \cdot m^2$