An unstretched spring has a force constant of 1200 N/m. How large a force is required to stretch the spring by 1 m from Its unstretched length? O
1800 N
2400 N
600 N
o
1200 N

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