Which of these instruments has strings but is not considered a traditional stringed instrument?

xylophone
piano
bass drum
viola

Which of these is a consistent periodic pulse separated into equivalent intervals of time?

Which of the following does not describe the patterns of rococo artwokr? a)jagged b)delicate c)curvy d)complex

What is one popular pop artist or group (from today or from the past)? why does this person/group's music fit into the pop genre? why do you think the person/group was successful with their music?