4.6+Sound+Tube

the tube makes sound when you sping it around this is starting as a posible chemical energy then it is kinetic then to sound. Good. Don't forget to account for heat losses. You do not feel it getting hotter but because there is friction between the moving tube and the air, heat will be lost. So we have: **Chemical potential energy (muscles)** --> **kinetic energy** + heat (waste) --> **sound energy** + heat (waste)