sound
A fan
the wind moves the flag
demonic possesions
if a part of the body moves back and forth
Yes.
The fastest seismic wave that also moves back and forth is the P-wave.
A fan
the wind moves the flag
it moves its body back and forth
something moves back and forth
demonic possesions
A
if a part of the body moves back and forth
then the egg will most likely being moving back and forth as well, especially if the chick is almost ready to be hatched
A longitudinal wave.
Yes.
Yes.