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 Civil Rights Act of 1875. Image courtesy of Moorland-Spingarn Research Center Before entering Congress in 1873, Representative James Rapier of Alabama worked as a newspaperman, a cotton planter, and as a state civil servant. On this date, the House passed the Civil Rights Act of 1875 by a vote of 162 to 99. First introduced by one of Congressâs greatest advocates for black civil rights, Senator Charles Sumner of Massachusetts, in 1870, the original bill outlawed racial discrimination in juries, schools, transportation, and public accommodations.