Answer:
uh well i can guess for you because i think i know,
1. physical change
2. water if heated up can change into a gas.
3.yeah
4.because the two hydrogen or whatever mixed with the one oxygen or whatever created two whatever
im pretty big brain as you can tell.
Explanation:
A wind instrument is a musical instrument that contains some type of resonator (usually a tube), in which a column of air is set into vibration by the player blowing into (or over) a mouthpiece set at or near the end of the resonator. The pitch of the vibration is determined by the length of the tube and by manual modifications of the effective length of the vibrating column of air. In the case of some wind instruments, sound is produced by blowing through a reed; others require buzzing into a metal mouthpiece.
Hello I have found the following Prefrontal cortex hope this helps