Spin (physics) discrete angular momenta despite having no orbital angular momentum. In some ways, spin is like a vector quantity; it has a definite magnitude, and it has a "direction" (but quantization makes this "direction" different from the direction of an ordinary vector). All elementary particles of a given kind have the same magnitude of spin angular momentum, which is indicated by assigning the particle a spin quantum number. The SI unit of spin is the (N·m·s) or (kg·m·s), just as with classical angular momentum. In practice, spin is given as a dimensionless spin quantum number by dividing the spin angular momentum
AD–AS model back to its steady state. As the inflation slowly falls, so will the AS curve back to its steady state. The modern quantity theory states that the price level is directly affected by the quantity of money. Friedman is the recognized intellectual leader of an influential group of economists, called Monetarists, who emphasize the role of money and monetary policy in affecting the behaviour of output and prices. Modern quantity theory also disagrees with the strict quantity theory in not believing that the supply curve is vertical in the short run. Thus, Friedman and other monetarists made an important distinction