[填空题]
What is the angular momentum of a 0.210-kg ball rotating md(vh:gc2gc/ on th (*2rwj86cyfg*w9un 3b j8 exlhld5qde end of a thin string in a circle of radius 1.10 m at an angular speex (8u3nj*elwb jr cg9ldf6qh5yd*w2 8d of 10.4 $rad/s$? $kg \cdot m^2$