In the MIT video entitled “
Breaking Glass with Sound [link]", the technician first had to match the
(A) generated by the vibrating cone of the speaker to the
(B) of the glass. As the speaker imparts
(C) into the system, the glass molecules began to vibrate at higher and higher
(D). This phenomenon is called
(E). Eventually the glass shatters. If both the speaker and glass had instead been placed in a
(F), the glass would never have broken since sound is a
(G) wave.