While all glasses are amorphous solids, not all amorphous solids are glasses; glasses exhibit an actual glass transition. Even though we say solid, a glass is actually a very viscous liquid that moves very slowly over time.
Unlike the crystal an amorphous solid or glass is a disorder arrangement of the atoms of the condensed phase.
At some temperature a supercooled liquid transitions to a more solid or condensed form; this is the glass transition temperature.
The glass in a window (for example) is really a very viscous liquid that moves very slowly over time.
A light bulb is more likely to burn out when first turned on since this is when the electrical resistance is the lowest. As the current flows it heats up the wire and the atoms begin to “jiggle”, which increases the electrical resistance.
The chemist Lavoisier actually tried to weigh heat; he found it was weightless.
The constant k in Boltzmann’s equation for entropy (S = k ln W) is called Boltzmann’s constant, but it was Planck who actually introduced it.
In gases like air, sound travels via collisions with the molecules; sound travels faster in gases when the temperature is increased (and the density is held constant).
Sound travels faster in air as the temperature increases.
At the microscopic level entropy is intimately connected to the motion of atoms.
