A yo-yo [see Fig (a)] is constructed from two identical uniform disks of radii R and mass M. They are held together by a massless cylindrical spindle of smaller radius R0. The yo-yo is wound with very thin, massless string. what is the speed of the center of mass of the yo-yo after descending a distance h

Two models of the same compound are shown. in what way is model b better than model a? model b shows the types of elements in the compound, but model a does not. model b shows the three-dimensional shape of the molecule, but model a does not. model b shows how the atoms in the molecule are connected, but model a does not. model b shows the number of atoms of each element in the molecule, but model a does not