Longitudinal or compression waves.
secondary waves
There are 3 kinds of Sub-Atomic particles. These are Proton, Electron, Neutron.
they have in common their both particles
both a and b
old filllings can be covering up progressed decay, because bacteria or food particles can become trapped, the tooth may have cracked, and this can cause all kinds of discomfort and pain.
back and forth side to sife
sound waves are compression waves, or longitudinal waves. sounds that we hear are actually just compressions and rarefactions of air particles, meaning the air particles move closer together for a time period then spread apart farther then they normally would rarefaction)
Amazon has all kinds, are you looking for the Logo or the on direction zipper?
Atoms and molecules.
what kinds of motion cause solar and lunar eclipses?
joints
up and down, left and right