A sub-woofer is a type of speaker that plays only the very low notes in a song or movie. What types o frequencies would you expect to be able to hear from a sub-woofer?

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.