[填空题]
What is the angular momentuz .8yd7:( e),7s)xzajoetochi) h tomm of a 0.210-kg keby; :,dhqv8ssb9z . xq cg))ball rotating on the end of a thin string in a circle of radius 1.10 m at an angular speed ;k z)y, b9egvsc8:s.dbqqhx )of 10.4 $rad/s$? $kg \cdot m^2$