Four friends, A, B, C, and D are standing varying distances away from a speaker which is producing sound waves. An illustration of a point labeled speaker with concentric circles spreading out from it. Every other circle is 1 more meter away from the source. 1 m is labeled A, 2 m is labeled B, 3 m is labeled C and 4 m is labeled D. Which person will most likely hear the loudest sound? A B C D.

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