Blowing air into a whistle causes air to vibrate inside the whistle, and pipe organ Vibrating columns of air inside the pipes are the sound source. Given these facts, blowing air into a whistle causes a what among the following options:
- rapid blast of heat
 - kinetic energy
 - little beads
 - activation energy
 - sound source
 - wind speed
 - small rattling
 - mechanical


 

     sound source    