Let's say a sound wave is traveling toward a microphone. The microphone picks up compressions and rarefactions as the wave passes by. When a compression hits the microphone, it receives a high amount of air pressure from the particles in that space. During a rarefaction, the air pressure is very low.
A: The Social Security Act was signed by FDR on 8/14/35. Taxes were collected for the first time in January 1937 and the first one-time, lump-sum payments were made that same month. Regular ongoing monthly benefits started in January 1940.nder the 1935 law, what we now think of as Social Security only paid retirement benefits to the primary worker. A 1939 change in the law added survivors benefits and benefits for the retiree's spouse and children. In 1956 disability benefits were added.
The Dawes Act was put in act on February 8, 1887 regarding the distribution of land to Native Americans in Oklahoma. Named after its sponsor, U.S. Senator Henry L. Dawes of Massachusetts, the act was amended in 1891 and again in 1906 by the Burke Act. The act remained in effect until 1934.he Dawes Act allotted federal land to Indians in Oklahoma in the 1880s (Oklahoma was just a territory then, not a state). Each Indian family got a number of acres.