PLS HELP ASAP A cannonball is shot from the top of a 47.8 m high hill at a speed of 53.7 m/s. How fast is it going when it reaches the plain below? [?] 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