a group of notes in music that produce a stable or calm sound could be described as
Consonance and dissonance "A stable tone combination is a consonance; consonances are points of arrival, rest, and resolution."
Van der Waals equation is the volume of the container occupied by each particle (not the velocity of a particle), and k is the Boltzmann constant. It introduces two new parameters: a', a measure of the average attraction between particles, and b', the volume excluded from v by one particle.
Base oil The least refined type which produced by Solvent Refining. It usually consists of conventional petroleum base oils.
Vein Veins are less muscular than arteries and are often closer to the skin. There are valves in most veins to prevent backflow.