You are conducting an experiment to discover the effect of water temperature on the time required to dissolve table salt. A large plastic trash bag has a capacity of 30 gallons. Sound waves are vibrations transmitted through matter. Sound waves are very low frequency radio waves. Sound waves are rapid changes in magnetic fields.
Sound waves are rapid changes in the attractions between molecules.
The picture below shows a portion of a graduated cylinder partly filled with liquid. Water is composed of atoms, which are composed of molecules. Water is composed of protons and electrons, which are composed of atoms. Water is composed of molecules, which are composed of atoms. Water is composed of protons and electrons, which are composed of molecules.