Why do the particles of substances vibrate? Just where does that constant energy come from?
It comes from thermal energy (aka heat), dude. We can approximate the atoms of a material and their bonds as an array of masses with each mass being coupled to its nearest neighbors by springs. The modes of vibration are known as phonons.
Originally posted by Bubonic Plague
Good. Let's say i were to put the substance in vacuum, will it's particles still vibrate, now that it has no source of heat? Let's also say that it is shielded from electromagnetic radiation.