Which best describes the motion of air particles when a sound wave passes through them?
a.
the particles move together and apart perpendicular to the direction of the wave.
b.
air particles move parallel to the sound waves
c.
the particles move perpendicular to the direction of the wave.
d.
the particles move both perpendicular and parallel to the direction of the wave.

you cant move and you feel like someones pushing you down onto your bed it can feel like you want to get up but you just can't it can be extremely scary

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever