ASAP need physics help please:)

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false

Use 4 to 5 complete sentences, explain the concepts of beats and how beats are produces.

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