Reflected shock waves allowed temperatures from 1230 to 1800 K and pressures from 7.3 to 9.5. atm to be obtained. These measurements have shown that cyclopentane is much less reactive than. cyclohexane, as for a given temperature the observed autoignition delay times were about ten times. higher for the C5 compound compared to the C6. Detailed mechanisms for the combustion of cyclohexane and cyclopentane have been proposed to.
Your Tax Dollars at Work. The average income in 2011 was $41,560. With this salary and a single filing status, you could expect to pay around $5,153 (12.4 percent of your earnings) in federal taxes, in addition to $2,577 (6.2 percent) toward Social Security and $603 (1.5 percent) toward Medicare.
Social Security is the sole source of income for about one in five (20 percent) people aged 65 and older. Certain subgroups are particularly reliant on Social Security. Of those age 65 and older, Social Security is the sole source of income for 40 percent of Hispanics, 33 percent of African Americans, 26 percent of Asian and Pacific Islanders, 18 percent of whites, and 20 percent of unmarried women. Social Security plays an important role in keeping older Americans out of poverty.