A ball is thrown. It has an initial speed of 15 m/s. It stops 5 seconds later. What was the acceleration of the ball? *
1 pol
-3 m/s^2
25 m/s^2
1 m/s^2
5 m/s^2
-5 m/s^2

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