Beta-plus (Î² +) radiation is the emission of positrons, which are the antimatter form of electrons. When a positron slows to speeds similar to those of electrons in the material, the positron will annihilate an electron, releasing two gamma photons of 511 keV in the process.
The Congressional Budget Office puts the cut-off lower, at $347,000 in 2007, or $252,000 after subtracting federal taxes and adding back transfers. Measured by net worth, rather than income, the top 1% started at $6.9m in 2009, according to the Federal Reserve, down 23% from 2007.
1 The earnings difference between women and men varies with age. 2  Younger women (89.8% of 20-24 year old women) are closer to pay equity than older women (73.7% for women 65+) for full-time wage and salary workers. Women were paid about 90% of what men earned until age 35, at which point median earnings for women start to slow down compared to men's earnings, further widening the pay gap. 2  The average full-time working woman will lose more than $460,000 over a 40 year period in wages due only to the wage gap.