Proteins, complex carbohydrates, like starch, fats, and nucleic acids are the important biological macromolecules and are essential to life. You learned that many industries depend on macromolecules such as elastomers, fibers and plastics.
For the album by Vic Mignogna, see Metafiction (album). Metafiction is a literary device used self-consciously and systematically to draw attention to a work's status as an artifact. It poses questions about the relationship between fiction and reality, usually using irony and self-reflection.
Rarefaction is the reduction of an item's density, the opposite of compression. Like compression, which can travel in waves, rarefaction waves also exist in nature. A common rarefaction wave is the area of low relative pressure following a shock wave. Rarefaction waves expand with time; in most cases rarefaction waves keep the same overall profile at all times throughout the wave's movement: it is a self-similar expansion. Each part of the wave travels at the local speed of sound, in the local m