[填空题]
Figure 8–53 illustrateum 6awu z6.;+ezq+i rzp4guq6 s azn +pwta8jmzggd*avl:3qm4u4l2pn)y0wt 75 n $H_2O$ molecule. The O–H bond length is 0.96 nm and the H–O–H bonds make an angle of 104 $^{\circ} $. Calculate the moment of inertia for the $H_2O$ molecule about an axis passing through the center of the oxygen atom (a) perpendicular to the plane of the molecule, $\times10^{-45 }$ $kg \cdot m^2$ (b) in the plane of the molecule, bisecting the H–O–H bonds. $ \times10^{-45 }$ $kg \cdot m^2$