what is the total mechanical energy of the ball in the ball return when it comes back from striking the pins if it is .8 M above the ground and moving at 1.2 M/S?

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