7-12 I need help with these test questions

Question 11 [1 point} own The amplitude of a sound wave refers to its: Question 12 [1 point} E-ll A pure musical tone causes a thin wooden panel to ~uriljrate. This is an example of: O A} resonance 0 31' harmonics O C} an overtone O D} interference Question 9 [1 point) emu Sound waves do not travel through: 0 Al liquids 0 Bl gases 0 Cl a vacuum 0 D} sollds Question 10 [1 point} Harmonics are resonance modes that are also called: 0 Al overtones 0 Bl resonance 0 Cl pitch 0 D} loudness Question 7' [1 point] emu Sound waves are: 0 A} longitudinal O B} [:uardvr longitudinal and partlv transverse 0 Cl torsional O D} transverse Question 8 [1 point] emu Sound travels fastest in: 0 Al warm air 0 B} vacuum 0 Cl water 0 '3'} cool air