Explain how Armstrong's group and this song, define the style "Hot Jazz" associated with the 1920's?

Who was pink floyd? i need answer for assignment answer who he was and three songs he sang.

Read the following scene from trifles. mrs. hale (resentfully). i don’t know as there’s anything so strange, our takin’ up our time with little things while we’re waiting for them to get the evidence. (she sits down at the big table, smoothing out a block with decision.) i don’t see as it’s anything to laugh about. mrs. peters. (apologetically). of course they’ve got awful important things on their minds. (pulls up a chair and joins mrs. hale at the table.) how would an audio recording most likely convey the characters’ emotions during this scene?

Avibrating object pushes the molecules together and causes an area of compression? true or false