Is there a state of matter in which the molecules are not moving at all? What is this phenomenon known as?

Why is nh3 classified as a polar molecule

Which material burns faster? metal aluminum

How is it possible for someone to put an ear to a wall and hear someone in the next room?     a.sound waves can travel though solids.    b.the waves travel from room to room via air.    c.there must be some air in the wall so the sound can travel through it.    d.sound waves change to electromagnetic waves and then back again.